First off, that post, as well as this one, was written tongue in cheek, as a bit of humor. I'm way too old to be bothered by any of this.
Second, never
assume, young man, surely you know what happens there. Seemingly experienced players claiming their neck is ruler flat tends to confuse new TB players that can't understand why
their neck has to have some relief!
Third, pay attention! Your
fretless doesn't have a fretboard! You have a fingerboard, which can be flatter than a laser line, if you wish.
Frets? Not so much........physics can be such a cruel master.
See the opening where contradiction rears it's ugly head?
Now, as long as I've got everyone believing I'm all worked up over your insolence, I'll just add that "Tone is in your fingers" is an inarticulate way of stating the truism that a change in playing style, strength, and position, as well as pick gauge and technique, can offer a broad palette of tonal variation
within the preestablished parameters of your current timbrel limitations, to include amp, bass, and strings. 
In other words, you don't need to reach for a
knob to change your tone.
No, it doesn't mean a Fender becomes a Ric becomes a MM becomes an Alembic. It does mean you may learn to bring out the most Ric-like tones from your FSO, etc., but not that your Pbass with flats into a B15 will sound like Chris Squire if you just play harder!
