I don’t really believe in coincidence with Gillovny so I would say no. David is in full middle life crisis and something or somebody must have triggered it.
Same with Gillian’s complete change of personality in the past few years.
Even if Gillian seems to be in better shape than him now, it hasn’t always been like that so I would say they both had a crisis, pretty much at the same time, one is over, and one is lasting way too long already. Maybe David needs a new haircut now…