The bigger problem is that it can be prohibitively expensive, which is why the ‘people will just adopt unwanted children’ line that anti-abortion advocates take is bullshit. They make as many barriers to adoption as possible, the biggest one being cost.
And worse, they can deny you outright. For things like having the wrong religion. State-funded adoption agencies.
All legitimate concerns. It’s definitely not the best option, or even feasible, for everyone. But it deserves more consideration than it tends to receive whenever the subject of having kids comes up.
I think along with that consideration is a necessary discussion about easing the difficulty of going through the process.