Oh don’t get me wrong, I find Josh to be a big walking ick for many reasons and not least his level of helplessness when it comes to doing anything on his own. I would hazard a guess though that when he works away the nannies / babysitters / MIL are utilised just as much as he does it.
His admission that he had never in his adult life worked out how to do laundry so Rose just does it all was a big red flag to me, I’m sure there are jobs he does that she won’t do but my sense is that there’s a big difference between could do it if you had to / wouldn’t know where to start. It’s not like he was 18 when they got together!