Would definitely talk you into it. IMHO. It will make you a better player.
I have lined and unlined. Muscle memory doesn't see the lines neither do your ears.
Even before you buy spend time with your fretted playing it as if it were fretless. Keep hitting those frets instead of the spaces in between. It will be a great help for later.
I would be so bold as to suggest that the side dot markers in the right place i.e. where the frets should be not in line with the fretboard dot markers in between the frets is a thing you should look for. If you can find a bass with those markers it will help you no end to learn the muscle memory to hit those spots that are in tune.
If you can't find one consider putting them in yourself or have a tech do it for you.
Personally I think it insane to have the side markers out of line with where the frets would have been. I really can't see why manufacturers do it.
Some of the older makes like Westone thunders were very good basses for not a lot of money and there are fretless payers on here that will confirm that.
For some reason they sell sometimes for a fraction of their real value as a very well crafted bass.
It wouldn't hurt you if you could find one. Same thing goes for a good Spectrum.
As someone else on here said play in the dark sometimes. If you have a good ear it will help that muscle memory a great deal.
Rotosound 88 tru bass
Black nylon bass guitar strings
Sound great, play great and last for ages.
Hope this all makes sense and helps you.
Go for it and enjoy it.