I think the affordability would depend on how long they last. I watched a pretty lengthy video on point shoes once. They were decently expensive and almost disposable. They do not last long, especially for professionals. I think they said some might just last a day.

There is also a whole process of customization, where the dancers spend quite a bit of time bending the shoes to their will and tweaking them to their liking.

I’d the 3D printed ones don’t last long enough to make up the price difference, or can’t be tweaked and tuned in the same way, those could both be problems.

I’d also imagine if a dancer learned in one style of shoe, they may just be comfortable with it… like Linus Torvalds maintaining an ancient obscure version of uemacs, just because that’s where is muscle memory and comfort zone is.