Actually since I am a stubborn old man also....I WAS going to end it as your little saying suggests but I decided to entertain your question....
I do not agree that an hour in a music store is going to "ENLIGHTEN" the poster.
I don't at all think that fretless players are any better than fretted players so please don't misunderstand what I say or accuse me of being a FRETLESS SNOB. My input is NOT based on what I see on the internet (that advantage wasn't around when I was first learning), it is from being a fretless player for over 25 years.
The discipline and developing of technique on a fretless takes years to perfect and the techniques are different from playing fretted basses. I do not agree that ONE HOUR in a music store is ample time to EXPLORE and make a decision to invest in an instrument you are unsure of. My first fretless endeavor ended AFTER I had purchased an instrument as there weren't any in music stores to just try out, they had to be ordered. I was very discouraged with my intonation as there weren't lined boards in those days. It wasn't until I was a more accomplished player and my musical direction changed that I decided to make another go. I know many a player who ended up the same way by thinking it was fun at first ,playing around with it for "an hour" and then when they actually got down to studying, abandoned it. That is not the worst thing in the world either....but the poster states he "has to be convinced"...which sounds like he is just kicking the thought around. Hence my first statement that you disagreed with.
I am not trying to discourage the original poster or anyone else for that matter. My statement was more so that if he NEEDS to be convinced then he obviously isn't sure and an hour in a music store isn't going to make him decide either way. To try something out just for the sake of trying it can also be a major expense for someone. That is something the poster would have to decide if it is worth dropping the money down on an experiment or maybe spending it on a cool fretted bass that he had his eye on instead. They also aren't always available to try out in every music store although it is true that today they are much more available than they used to be , and at a lot less money.
Yes , of course one would have to play one to see what it is like but they would have to spend much more than an hours time in a music store messing around with one to determine if it is something they would enjoy and if it fits them stylistically. Maybe the poster will be a natural and connect with it immediately which would be GREAT , although pretty rare.
I would love to know what he ultimately decides.