If you have most of the work and conversation is done in public, you're not hiring very curious people.
I'm a pretty staunch defender of remote work for most roles, but outside of the smallest companies where the entire organization is on a single conversational thread, you really do lose the organic peripheral vision that comes with an office environment and deliberate effort is required to try and recreate some of that in your fully-remote org if you want some of the same upside. Even with deliberate effort, I'm not convinced you can match it perfectly.
It's not like there are that many natural opportunities to meet and interact with people you don't directly work with when everyone is remote.
Same with writing bad code. We’ve all seen sub-optimal decisions in code or technical artifacts that go on to be successful products or tools. Most people can’t/wont/don’t work at the Pareto-optimal workplace.