It isn’t as if iOS hasn’t had its share of scandals recently, including their recent app usage of restricted functions…functions Apple thought they could restrict by scanning for them in the code. But, either way…
The MTP issue isn’t a Samsung one. It was thought a security issue to allow direct access to the filesystem of the device by USB cable. The old solution was partitioning, but it meant a hard limit on app installs. So, MTP allows a single filesystem, but the media coming out securely and easily(well, not in your case). The MTP experience on a computer is definitely a problem though.
WhatsApp no making it easy to work with their data is a symptom of the bigger data portability problem. I really think your problem isn’t Android and iOS and the bad transfer experience. The issue is that few companies makes it easy to take data out of their siloed systems. Most people will give up on the effort.
