Madison and F8 nailed it, as usual.
I speak as another adult amateur who has imported 4 nice horses (3 hunters, one dressage horse) from Europe over the last few years.
I did not see or sit on a single one of them prior to buying them their plane tix, BUT I did see videos and I DID have a trusted contact on the 3 hunters who knew me, and knew what would be suitable for me. The dressage horse I bought off his sales video completely on my own as a barely started 4 year old BUT he was so well bred and reasonably priced, I felt confident that I could have resold him and recouped my investment if he arrived and turned out to be unsuitable for me in some way. (He actually has been exactly what I hoped for and will nevereverever be for sale.)
In contrast, trying horses here - particularly for the hunter ring, where I have decades more experience - seems a lot harder, particularly if there are budget constraints. If you have a bottomless wallet, you can go to any of the big show/sales barns and sit on a lot of horses … then I suppose all you have to worry about is getting a good vetting to include sophisticated blood work, and trying to ensure you really understand how the horse has been “prepped” for you to sit on. I’ve seen a lot of very beautiful, very expensive hunters that have been “prepared” in a way that I personally wouldn’t be comfortable with or willing to replicate.
If you buy from smaller shops, private individuals, or breeders… there may be much less of that sort of risk, but IME it was quite difficult to A) find those horses and B) arrange travel to see them, as by definition they are in small programs and spread out all over the place. I personally wasn’t willing to get on a plane to see one or two horses, but that may not be the case for everyone. And I sure didn’t want to do that 10 or 12 times in my search. (And to everyone who always objects to the cost of a plane ticket for an import, saying it adds no value… I say, I’d rather buy my selected horse a ticket than spend that $$ flying myself around the country.) For me it’s not just the expense but the TIME factor.
I am definitively NOT saying you can’t find a nice horse here. I just found it a lot easier to buy in Europe, and so I’ll continue to do so.