You're absolutely right about it being a bandaid thing. I think it got introduced to the game to remedy that you went slower if you touched the track with the front wheel on the old bike 11. So we reduced the friction on that one (if you're not braking that is).. We didn't think of the case where you only ride on your front wheel
Removing it now would mean to release an updated bike11 that's slower than the current iteration.. And I don't think that's a good idea as we would need to force everyone to update and some old scores would be impossible to beat.
So I think it would be best to keep the bug/feature for bike11. Maybe a bike12 which didn't have this but was faster in other areas would be fun (so you would need to choose bike depending on which track it is)