as a society we should not allow people to get paid so little that even a full-time salary is not enough for them to have children.

that is what's wrong.

if we want a balanced society then we need to enable everyone to have children, not just those who are able to get well paying jobs.

in austria and germany this is solved with giving parents tax breaks and unconditional extra money for each child to offset the higher cost of raising children.

So if I choose a career as a not so good artist the government should subsidize me so I can have kids?

to follow the existing examples, every child gets government money regardless of income. it's like UBI for minors.

and if you get a minimum wage job as an animation assistant doing inbetweening work, then the laws should make sure that the minimum wage is high enough that you can afford your living costs.

combined both measures will allow you to have children.

if you are self-employed and you are not earning enough money from your art you need to apply for unemployment benefits with all the conditions related to that.