Unless you are playing your own B3, and soldered in the resistors to change the preset keys (the reverse ones), you ALWAYS had to make your own drawbar changes...

Then there's the old trick of just opening out the top two or three drawbars just a hair for the chorus and back for the verse (even if you weren't making gross registration changes) and you can see that finagling the drawbars constantly was a staple of B3 usage back in the day, and still is in today's clonewheel era. Presets don't really cut it for the fine detail work, although they are handy for setting up songs (and used to be if you made your own on the B3 as well).

The fact that you see many players relying simply on presets alone is usually a dead giveaway that they never cut their teeth on the real thing, IMO...