"is because P1 needs to perform well in their job to financially support the household." And P2 supports them to do that by running the home and doing full time childcare.
The child is BOTH their responsibility.
In a job that requires on call etc p1 would be stuffed if p2 wasn't a sahp in all likelihood. They BOTH contribute equally to the household running as it does and that includes p1 being able to do that job.
Are you p1's parent?
"P2 never had a career to "sacrifice", always did a minimum wage job wanting to be a SAHP one day. So both are doing what they want, career-wise, neither has made a huge sacrifice "for the family" on that." Nice attitude!
"P2 does the cooking and laundry for themself and the child. P1 does their own. P1 does home improvement projects on the weekend if there is enough time." And who does the dishes, dusting, hoovering, grocery & other shopping, mopping floors, cleaning kitchen, cleaning bathroom, putting rubbish out, ironing, organising household admin, healthcare appointments for child? Doing their own laundry & the occasional bit of DIY doesn't sound like a fair contribution from p1 to me. Yes p2 should be doing more than p1 but not almost everything! Inc mental load for home!
"To mention, the only reason this has come up is because P2 has complained to several people and on social media that P1 is "not pulling his weight in the household" and that P2 is "stressed from doing everything myself"." Sounds about right to me and if it's got to point p2 is posting on SM p1 clearly isn't listening!
IF p2 is genuinely only cooking for themselves & toddler I'd be v surprised to learn this wasn't a relatively new development as a response to p1 thinking they didn't need to do anything at home! That p2 had to ASK p1 to take child at weekends somewhere to give p2 a break from the child suggests it never even occurred to p1 that p2 might NEED a break - but nobody can be "on" 24/7 365 days!
"Im more on the side of P1" as are most who seem oblivious that op has worded the posts so that's the natural bias.
"I believe I have a reasonably fair view of the physical work split" you really don't, you clearly favour p1
"I'm not a SAHP so don't know whether it is genuinely more stressful than working" everyone's different, some cope better than others.
Eg where you getting the idea p2 wanted to be a sahp? Just because their job was nmw doesn't mean they didn't enjoy it. It's certainly not uncommon for p1's to put pressure on p2's to not bother going back to work, usually cos it suits them for p2 not to work and give the 'reason' that 'childcare will cost more than you'll earn' when they're each 50% responsible for the childcare. See it on here constantly.
Or even if p2 originally thought they wanted to be sahp reality doesn't always match the idea. But p1's often hold them to their original plan without considering people might find they're not suited up being sahp. Few have experience of such a role until they're a parent. I had some idea as I'd been a nanny before becoming a parent but most people have done non child related jobs beforehand.
"Um, do you fancy p1 op?" I'm wondering same. Or is mil or sil to p2.
"Put it this way, if a SAHM posted here that they were in P2's situation, and said that their husband doesn't help with any household chores, people would be up in arms! I've seen it." Exactly!
"Your disdain for P2, SAHP and low income earners is shockingly obvious." Totally agree!
"It was not contempt at all." Your contempt & disdain for p2 is dripping from the very first post!
Frankly not only do you need to butt out on this particular issue you need to spend less time there generally. You're far too invested in another couples life
Hide their FB newsfeeds too.
I'd be VERY Surprised if p2 REALLY did absolutely nothing on the day the child is at childcare. They may well be doing things that are 'invisible' but are easier to do without a toddler at your feet. Certainly when I was a sahm when dd started at crèche (for her socialisation & stimulation mainly) I used that time (2 hours twice a week) to go to Drs/dentists, to phone bank, insurance companies, sort other admin that required concentration...