I think that all three solutions have their place, and it is important to have various alternatives available. "Competition" is also essential and always a good thing for the end user.

One thing I wanted to add, ACF is also the product of a single-person developer, as is Lazy Blocks. So technically, ACF can also go out of business. Only Block Lab is developed by a team.

Though, I fully agree that it makes not much sense to hide your name/personality when you are releasing such stuff. Fair enough, there might still be reasons I am not aware of, sure, but I can only but recommend to be bold and also stand with your name and personality behind your product, even if it is a free plugin you are doing. I speak from my experience since 2011 (when I started with plugins) and I have only made good experiences. It helps people to better make "the digital handshake" and have more confidence in what you are doing. And ACF is the best example for that on a bigger scale :-)

Whith that all said, I already integrated all of these 3 solutions into my Toolbar Extras plugin as well, so you get quick jump links from the Toolbar to the various settings and post type admin pages etc. Can help in day to day work.