To not understand why people are anti benefits to SAHP but want more help to pay childcare?

[mamapants]

I regularly see posts where people are considering giving up work temporarily to stay at home and would need benefits in order to do so. Although answers are split they tend to be mainly posters saying that isn't what benefits for and that the person should go back to work even though all the wages gained go on childcare. And a lot of comments about tax not being there to fund your choices etc.
At the same time posters and society as a whole seem to have no issue whatsoever in claiming 'benefits' to pay their childcare bill. Often amounting to more money. And normally saying there should be more help.
Why are they treated differently? Surely you could argue that having your childcare paid is having tax payers paying for your choices and if you can't afford to work then you shouldn't expect someone else to fund it.
Interested in why they are viewed so differently.

Yes, this is the whole point of supporting parents who have DC to be able to continue to work and have some free childcare. The funding ultimately comes from tax payers and is a temporary period, which we actually pay for really.

Economics 101.
Childcare and a working mum both contribute to the economy via taxation - 2 working people. As opposed to one SAHM claiming welfare who contributes nothing and is funded by other taxpayers.
I’ve often thought childcare should be fully tax deductible (without actually crunching the numbers, so not sure if feasible)