I'm not entirely sure this situation is as simple as sahm v wohm.
On the face of it I'm amazed that in 2020 any woman has to justify her choices to anyone else (except those who it impacts which I'll come on to). Both choices are valid and hard in their own way, and often life creates a situation where it isn't a choice and we all have to get on with it and that should be respected.
I've spent 22 years in an industry and 7 working specifically to get to a point where I have a genuine work from home and balance my own diary job. It's totally worth it , some days I get the best of both worlds but there are days where I get the worst of both worlds (just to be crystal it's a proper qualified role not an MLM which I hate with a passion).
However being honest OP reading your posts it comes across as vague and a choice. For some I do believe not working whilst DC are at school is still a very valid choice (life does not run smoothly and as a parent of an SEN child being in school does not always mean full hours) however you are saying you basically dont feel like it , it would be an inconvenience. You dont seem (unless I apologise if I've missed it) that your dh has not agreed to pick up half the household duties. Have you even had that conversation?
There is an awful lot of vague excuses without clear research. Have you actually discussed breakfast club or afterschool club? Surprisingly for a period last year SEN ds1 had to go to one before I got this role and he absolutely loved it....it did wonders for him , from being wraparound care for me to work it became a keystone in his development.
You vaguely say you are not sure it's worth it financially ? Have you actually looked at possible jobs and what they would pay? Have you worked out the finances ?
Honestly if I was in your dh position (and as it happens I have been ) I would be irritated if I was getting vague replies like " oh I dont think it would be worth it" etc etc without any actual attempt to look onto it. It would feel like you were taking the mick.
I genuinely believe SAHM role is massively underappreciated but it also doesnt equate that if one partner doesnt agree with the system and is prepare to step up, its then unreasonable not to look into it because you find vague half excuses without actually checking if it's really the case.
It may be how you've written the post and in fact you really have looked into it but it's not how it comes across to me.
I dont agree that all children benefit from childcare but some really do, unless there is a genuine reason to think they will struggle that's not a reason. You say you prioritise getting DC to school, we all do surely ? My asd child can be bloody hard work to get to school but we manage it , even when we both worked out of the home. However there are days where my NT child also plays up going to school , it's very manageable even with a fullt time job (note I didn't say easy)
Holidays are always challenging , I've used all my leave as has DP to cover the holidays. We dont use holiday clubs because they are ridiculously expensive in my area for not much provided and ds1 would struggle. However we have managed to work it with annual leave and some days where we have had to finagle it here and there.
I guess ultimately , no it's not easy but it is very doable, and to be Frank your reasoning dont sound well researched.
I did it as a single parent and that was truly brutal but talk to your dh and see what he is prepared to do to help (if nothing then I agree it's not workable)
As a SAHM you are genuinely vulnerable. You do really need to consider that, it's not remotely about devaluing the role , I've been in the situation where my marriage ended and it was awful, I hope it never happens to anyone but my saving grace wa I had money , I had a career and I kept the DC and I going . There is a huge comfort and power in that