The Moral of the story is that you NEED google analytics or some tracking on your site in additional to your Meta Pixel. Hotjar is optional, and free, but GA4 is a must.
The good news is it does a lot of new helpful things. For example, Google Tags and Optimize Google were designed to work with GA4 and it’s what we use for refinement. So like it or not, we all need to learn and migrate to this.