I'm fine buying prints or other similar things online but with original art, you need to see it in context and detail. I would love some sort of pseudo-VR style experience to actually get a sense for texture and depth. For example, this one taken at random* is almost $5k and on my 4k laptop screen the zoomed in version isn't particularly crisp and I only have the one fixed zoom level. I can imagine paying in that ballpark for art but not under these circumstances. I can appreciate that there might be issues with having too high res an image available, etc., but still... Maybe you could mitigate this with similar return policies to the online mattress places. As is, the risk of spending a lot and ending up with something that isn't quite what you expect is just too high for the big ticket items.

* https://artinres.com/artworks/rebecca-kaufman-pre-experience