i think just michael is based on LA, so he prefers having the offices near his home (has kids, etc), and has enough FU money to not need to let the VC's dictate where the HQ's are located at.
I guess also they dont love the idea of managing people remotely for a small startup/first hires, although im sure for the right person they wouldn't really care (or usually this is how it goes on most small companies/startups)