Rolling resistance with tubs is higher than with clinchers.
This is mainly a function of the way tubs are glued to rims, and using easy alternatives like tub tape make the rolling resistance worse.
I suspect the first time you have to try to remove a tub in the rain, with black brake mess all over your hands, then try to mount a tub, in the rain, with more black brake mess all over your hands, and the irritating thought that a wet rim plus a wet tub might not actually make for the best adhesion situation, and spend the rest of your ride cornering gingerly, you may then reconsider the ‘advantages’ of tubs.
In reality, they have one advantage; you can ride for a bit on a flat tub.
The retro and keeping-it-real bragging rights might sway the deal, but for real world application, tubs simply don’t cut it for the unsupported amateur.
So glue tubs on properly then they roll great
To be fair changing a flat in the rain or cold is a ballache whether clincher or tubs.
Clinchers are now very good and easier to use particularly if you are inexperienced or lack confidence glueing etc .(no shame in this btw)
I use both tubs and clinchers.