"I don't want to work for a place that's still super raw (best case) or a gigantic clusterfuck (worst case)."
Depending on your risk appetite, family factors and time in life, it seems perfectly reasonable to signal a better value alignment. He/she could take a (let’s say gigantic) equity stake in a pre-seed entity and low cash, in which case it’s be an extremely expensive employee with no sensitivity around the round or stage of company.
Also, and sorry for belaboring this, but having a round starts the “clock”; personally that pressure to do X or raise Y or sell/IPO is not a feature but a bug, and for others that common goal orientation and team alignment might be really valued.
Just guessing :)
Series A: Startup is making money and has a repeatable and scalable business model. They may still be in the red with fixed costs, but every dollar spent on marketing returns more than $1 in income. The work is usually turning those hacky prototypes into stable code.