Actually, to a certain degree, I can agree with you. While I have been a solid Mac user since 1990, I have also long believed that macOS has become major bloatware. There are many apps installed which I don't use and have absolutely no need for. However, at the same time, by your very comments, you have made an important point.
It all depends on each person's perspective. That is, what are considered bells, whistles and bloatware to one person, may be considered as absolute necessities to another user. We all use our machines for different things, so Apple seems to have taken the middle ground. That is, it tries to provide apps which will be useful to as many people as possible, which of course makes the overall product more attractive to more potential buyers, and thus more profitable for Apple.
Let me give you an example. You don't like the Mail app, iTunes or the Photos app, and prefer to use Google products. I am the exact opposite. I require and use all three of those apps on a regular, sometimes daily basis. On the other hand, after a few years, I grew to detest all Google products; not only because they snoop all over the place, but also because they install files and folders in so many different places, that they can be very challenging to delete when one decides that he no longer needs a certain Google product. So I no longer use any Google apps, period.
Another point worth mentioning is the following. Considering how large Apple hard drives are these days, and how little memory and processing power a "dormant" app uses, it is really no problem to just leave it sitting there on your hard drive. Yes, I realize that some of us are neat freaks. I am one myself. But I am not going to get all bent out of shape because there is something in the "Applications" folder which I never use. It is just not worth the frustration or aggravation.
I agree that it would be nice if we could easily delete default apps which we have no need for, but I seriously doubt that Apple will ever allow that to happen. Why not? Because they are into uniformity regarding the products that they sell. They have spent years working on a certain look and feel, and people now have certain expectations when they purchase an Apple product.
In the end, it is your machine, and you are obviously welcome to do on it and with it as you please. However, personally, I would not take your approach, because it will eventually spell trouble.