This has been done many times, and I usually avoid posting on these threads.
I've found being a SAHM for the short time I did it very easy. In comparison to working full time. I'm now 4 days a week work and it's a bloody doddle.
I feel like I have a great balance and a clean house which I never could manage working full time or being at home.
Staying at home full time was boring unless we were always out, but even that gets repetitive and expensive. I also lacked motivation to get things properly 100% done around the house because I always seemed to have time, especially when dc was at school. But somehow managed to faff it away.
Working vs being at home means engaging your brain in a totally different manner. They are different kinds of tired and stress. You can't really compare them. Also, everyone handles things differently.
Personally, although I don't have to work, I choose to for many reasons, one being my mental health.
There's no way you can clean everyday for 6 hours a day unless you're in a mansion or have the filthiest house in the UK. Fitting in school runs and home/school admin has never been easier. I often sort these things out in the bath on my phone. Tech has made life so much easier.
But everyone seems to be a martyr and the amount of self-sacrifice on display is just cringe.
Working vs not working to raise a family is often a choice. You either do or don't or something in between. I say it's often a choice because there is state welfare to help with living costs and childcare costs. Choosing not to or to go on UC is a choice. Sometimes, in order to work, you may have to rely on UC.
I'm tried to be goady, just putting it out there. It's always easy to look at others and be envious or even thankful of your personal situation. Ultimately, if you're not happy with it then change it or accept it. But stop moaning and let others live their lives.