If I had bought a tub based on the sales info, I would have been sorely disappointed. After wet testing at the first place and sitting in nearly every tub they had, we looked at each other and decided if that's all that was out there, we didn't want to sink our $$ into a tub. We had only ever been in commercial hot tubs....not the portable kind for backyard use.
After coming to this forum and getting advice on some different brands and then doing a wet test, we fell in love.
I'm guessing that most people who buy without wet testing, just don't know what or if they are missing anything and are thrilled to be tubbing. Good for them! You're right.....no sense second guessing AFTER the purchase has been made....just enjoy!