Background: US-based. My spouse and I adopted our two children, domestically (Kentucky, Ohio).
A lot of people operate on the assumption that in adoption there's a huge "supply" (I'm loathe to use that word when it comes to humans) and insufficient demand. The reality is quite different. Firstly, there are not "millions" of babies up for adoption. That's simply not the case. Secondly, international borders complicate adoption very significantly to the point where in many cases it's not a meaningful option (e.g. a US person will have to go through massive difficulties to be able to adopt from Russia these days). Thirdly, it's an expensive process and quite often it's a crapshoot what you end up with, genetics-wise.
So it can make a lot of sense that, if you can "fix" one specific thing, you'll want to go with the old-fashioned way of having kids (modulo CRISPR, of course :) ).