I don’t think this is an all or nothing issue. The beauty of WordPress is that it allows a great degree of freedom in how people build websites using their platform. However, freedom is and can never be unlimited.

Automattic is not making everyone adopt blocks and the major changes of version 5.0 yet. They are gradually making, what I feel are reasonable requirements on people who use their platform and that is to make sure their websites are compatible with a version that came out in 2016. I think this is a good balance.