From what I can tell, their solution is to personalize the web by creating personal websites. Here are the 5 steps at the end that they list to construct a personal website:
1. Start small
2. Reduce friction to publishing
3. Don't worry about design
4. Use the IndieWeb
5. Join us in sharing what you've made
Yet no mention of the real friction: buying a domain and getting hosting set up. There are a number of free alternatives out there but they are not well known by the public.
The weakest part is the last one - and it's a big one. Personalsit.es is just a flat single-page directory (of thumbnails, even, not content - so the emphasis is design.) To be part of the conversation, you'd list there and hope someone comes along. Compare with Reddit where you start commenting and you're close-to-an-equal with every other comment.
Webmentions do get you there - because it's a commenting system. But for finding the center of a community, it seems like you're still reliant on Bluesky or Mastodon or something. (Which doesn't "destroy all websites.") Love the sentiment ofc.