In reply to Dan Neumann.

There is a difference between wordpress.org and wordpress.com of which I feel not everyone grasps. Automattic is not making everyone adopt blocks and the major changes of version 5.0 yet. ...on people who use their platform....
Wordpress.com may be owned by Automattic, .org isn't. Although they contribute a lot to .org as well, the software on .org is open source(GPL).

And because of this software being open source no one other than the site owner (or server owner) of that particular installation (configuration) is supposed to make this kind of changes to it.

One of the freedoms is to adapt it and make into whatever you like. If you want to change the core, (although not wise) go ahead. I've actually seen developers do this, changing the core. Wise? No! In theirright? Yes! That's the whole philosophy behind the idea of open source, opposed to proprietary software.

I think no one is questioning the intention behind the idea of building a safer internet, but stay on track who is the one that makes the shots on existing installations.