No, that's not what we do. Nobody who actually knows their instrument blindly wrenches on their bridges like that when they fit flats to their FL bass. Instead, we play it for a couple of tunes and, recognizing the smallness of the change, we simply note that the issue "heals itself", via our normal intonation skills. No tools required, just a little practice.
L
oh, is THAT what we do? Huh. I guess adjusting the intonation to be correct on my fretless basses, so they are exactly correct for the 34" scale length, when I change to a new gauge of strings or type of strings, is incorrect, because obviously I don't know my instrument.
The logic of your statement is flawed. You claim that if you know your instrument, then you know that, if you change your strings in a way that alters the intonation of the strings so they no longer exactly match the scale length of the instrument, then now you have to constantly adjust your playing to be in tune. You must relearn your instrument, and compensate constantly for the change until it has become second nature. And of course, the amount that you have to adjust is slightly different for every single note you play on your instrument, math being what it is, which makes the learning process challenging if you care about being exactly in tune.
So your claim is illogical. In reality, logic states that "if you know your instrument, and you have the very simple ability to adjust the instrument so any change in strings results in no change to the playing of the instrument to be perfectly in tune, then you make those simple adjustments."
Why relearn your instrument? It is a simple solution, and standard recommended step for all bassists with intonating bridges, by turning a single screw, often, or loosening one or two hex keys and then turning a single screw for each string.
Do you seriously not spend the 5 minutes it takes to adjust the intonation on your instrument if you change gauge or string technology enough that it no longer plays perfectly in tune at the exact finger placement you already learned on your instrument?
Of course we can learn to play the instrument differently with different intonation. But that goes against your premise that "Nobody who actually knows their instrument blindly 'WRENCHES AWAY ON THEIR BRIDGE LIKE THAT'".... since what I explained, a simple intonation adjustment done by ear quickly, makes your entire workaround for not bothering to intonate the instrument, which as you explain it amounts to relearning how to play in tune, moot.