He is clearly a nice horse and you are clearly a nice rider. If he were in the states and you knew the program he was coming out of and they vouched for his honesty, then yes, go buy him. There are just too many stories of imports that can’t handle an American ride and based on what you’ve said about him/the show video of him, it would be a risk I personally wouldn’t take.
Generally the more careful they are, the less brave they are (and the braver they are, the less careful they tend to be). Of course there are exceptions to the rule that are super brave and super careful and those have a super high price tag that reflects this. It is very important to me to have a horse that is going to jump every time it is safe for us to do so than to have one that is going to stop if they think they’re going to touch the jump.
You know your riding and your personality better than anyone. I’m more accurate to the jumps than most people, but I have zero bravery (thanks to owning a dirty stopper for years as a teenager). If you are above average accurate and above average brave, a horse like this has a chance of working for you. If you are essentially accurate and extremely brave it might work for you. If some stops are going to suck your confidence, this would be a terrible gamble. Think about your reaction when you come out of the corner for a short approach to a wide oxer and the horse sucks back dramatically. If your instinct in this moment is anything less than a full send, it will be a tough road (and yes, this should be the instinct for all of us - but the majority of riders first have that “oh shit” moment and it’s too late to fix things by the time you find your false confidence).