The definition of a Photo - What is it - Move and not Copy out of Photos App

Obviously English is not your first language, so it's kind of ironic when you use vague and unclear terms like

the concept of like sharing, (real)synchronizing, Photos, Album a.s.o.... 

So you will need to explain what you mean by "like sharing" "(real)synchronizing" etc, and these are not standard terms in English.

Again: "Those who so strongly believe that a Photo is a Photo that they forget the real world. "

Unfortunately this is a meaningless sentence in English. It is quite possible to believe a photo is a photo. It's quite possible to believe the opposite. There is no obvious connection to the "real world" here, in the context you're providing.

To cases:

On Windows, you can ALWAYS hold down the shift while moving files or photos, where the USER decide whether to MOVE or COPY. Move and Copy are two different things!

Correct. And it's the same on a Mac.

On my MAC this seems to be different (at least I didn´t find the shortcut), so, there seems to be no way to MOVE (not COPY) pictures out from a Photos-Album and over to more like a document-like-fokused storage. (One has to do the risky/stupid/crasy to first to move and then delete as far as I have found....)

Correct. But you're misunderstanding what's going on here. Photos isn't a file manager, like the Finder. It's a database and what you're doing is exporting from the database to the finder for use in your document. If you don't want a database, why are you using one? (Incidentally, this is true of database objects on all Operating Systems.)

So, if I understand you correctly, you don't want to import some photographs you take into your Photos Library. Here's a really, really easy solution for that: don't do it.

No, every photo you take on your phone is a photo. All of them. The whole lot. The fact that some you choose to manage differently is down to you. Essentially, take the shot. If you don't want it to show up in Photos on your Mac then don't use the iCloud Photo Library. Instead connect your phone to the Mac and use Image Capture (in the Applications Folder) to select the destination for your preferred images.

The idea that there is a financial reason behind any of this is claptrap. Your problem is that you don't understand the tools you're working with.

My friend, I can only attempt to understand what you are trying to say. While you may indeed 'speak a whole lot of many languages', there's no indication that you do so competently. Here's a tip: learn to understand the tools you're using. You'll have a better experience.

To move a file instead of copying it hold down the Command(⌘) key and drag. However, when "moving" between volumes if there's a hiccup in the process you can lose the file entirely. Not so much when moving between folders on the same volume. Remember this is all in the Finder.

In Photos there is no "moving" of the file to another location. If you drag an image into an album it just puts a pointer in that album that refers back to the original file. So no matter how many times you see an image in your Photos library there's only one file representing them.

As Terence pointed out Photos is a database driven image organizer and not a file organizer like Windows. It's different and better.

You should review these sites to learn how Photos work:

Photos - Official Apple Support

Use Photos on your Mac - Apple Support

Photos for Mac: The ultimate guide | iMore

How toHow to use the Photos app for Mac - Macworld UK

So when you've read these documents and still have questions come back as ask again, this time after reading Writing an effective Apple Support Communities Question - Apple Community

Also, photo is short for photograph and it's definition is:

Photograph

A photograph (also known as a photo) is an image created by light falling on a photosensitive surface, usually photographic film or an electronic image sensor, such as a CCD or a CMOS chip. Most photographs are created using a camera, which uses a lens to focus the scene's visible wavelengths of light into a reproduction of what the human eye would see. The process and practice of creating such images is called photography. The word photograph was coined in 1839 by Sir John Herschel and is based on the Greek φῶς (phos), meaning "light," and γραφή (graphê), meaning "drawing, writing," together meaning "drawing with light."