For me 21 should be the minimum legal age for an ATPL and 8,000 hours minimum for Captain - or at the very least a combined total of 8,000 hours experience
Absolutely not a problem for me.
Passengers just need to get re-accustomed to paying more for their flight than their Uber to the airport!!!
Good luck with that one!!
People get what they pay for. But when they pay for their ticket, they don't care what they're getting!