can't send photos to androids from iPhone or Mac

First your “expert” is not an expert; photos between Apple and Android do not use SMS, they use MMS. SMS=Short Message Service; text only, limit of 160 characters, actually uses the voice channel, not data. MMS=Multimedia Message Service, uses cellular data, cannot use Wi-Fi. It is MMS that sends pictures, not SMS (although every MMS message has a companion SMS that manages the MMS component).

And no, Apple cannot possible work it out with Android, because the file size limit on MMS is imposed by the cellular network operator, the service that carries the message between the iPhone and the Android phone. This limit is set by the carrier, not by Apple and not by Google (the “owner” of Android). The default is 300 MB, which means only very small photos can be sent between iPhones and Android phones (or between two iPhones not using iMessage or between 2 Android phones only using MMS). Many carriers support larger file sizes, some up to 3.5 MB, but that is still smaller than a full-sized iPhone photo. iPhones will try to rescale the photos to fit within the bandwidth limit imposed by the carrier, but that is not always possible.

If you want to send large images you can’t use MMS. You can use WhatsApp, Signal, Telegram, Google Duo, Facebook Messenger, or email. Email providers also have a limit, usually between 10 and 20 MB. Apple also has a service called Mail Drop. It lets you email files and images up to 5 GB; it does this by uploading the file to Apple’s servers, then sending a link to download it in the email. It’s easy to use; just send a file that exceeds the default limit and it will automatically be converted to Mail Drop. This works with any type of destination device; iPhone, Android, Mac, Windows, even Linux.