Well, all I can do is elaborate on my first-hand anecdote as evidence that it can work in the VC-funded world: my employer has exactly the same corporate-future

Well, all I can do is elaborate on my first-hand anecdote as evidence that it can work in the VC-funded world: my employer has exactly the same corporate-future concerns you listed, uses contract language from a well-known law firm intended to protect their needs as they grow, did not receive any input from me before adopting legalese with these properties, and has already received multiple funding rounds. And, everyone I've described manages to collaborate enough during the workday (and asynchronously at other times) despite often taking multiple hours per day for things like gym or family. I'm happy that I can hire such people, and I wish you luck in evolving your company to the point where you can similarly access the full pool of qualified candidates. I think we've continued this conversation thread as much as we usefully can; thanks for an interesting exchange!