"Disabled" is not metric among those who have disabled it, while WebGL enabled allows identifying different browsers with WebGL enabled.
I know what you mean, but statistically, I don't think that it is easier to guess the person from those who have disabled it versus the list of all browser fingerprints where is that matching or very close unique fingerprint.
Unless you disable all JavaScript you’re leaking something.
Honestly, you’re still leaking a bit without js, as long as where you’re connecting to is checking.
The game is just choosing what you’re okay telling wherever you connect to.
It makes you look the same as everyone else with webgl disabled. This happens to be a reasonably large number of people, because it's the default setting in a variety of privacy focused browsers.