Yes.
Of course life finds a way and surprises happen, but I think it is completely irresponsible to actively TTC a child that you know you will not be able to financially support yourselves.
It is bad enough when people TTC without fully assessing their finances and checking they can afford to have a child, but until you have one I guess there are costs you may not consider beforehand or realise how expensive certain things (like childcare) can be. But to assess, KNOW you cannot afford a child yet TTC one anyway? Completely reckless and irresponsible, intentionally adding another financial burden to society.
I'm also of a view that those on full benefits (excluding disability) shouldn't TTC. After all, any. Child born is immediately one you cannot afford to support yourself. I imagine it's an unpopular view but we need to be realistic and honest here. No one should ever have the right to deliberately conceive a child that they know full well someone else will have to pay for.
ETA: I also would personally WANT to be able to take our children on holidays, day trips, to restaurants, afford them hobbies that might cost money, to get them new clothes etc. I lived in poverty as a child, it was enough to make me want to afford my children a much different upbringing and lifestyle. We could afford more children but it would stretch our finances, I feel I owe it to the babies I have to not stretch them to a point of denying them things they might have otherwise had xx