True, but the heat dissipation is directly related to the pad off-gassing. Cooler pads don’t go to the vapor stage and therefore retain positive contact with the braking surface. Also, moisture is dissipated faster with disc brakes so wet braking is less variable.
And a better pad/shoe composition, off gasses at higher temps. Fades later, at hotter temps. It is the gas trapped between the pad/shoe that prevents the pad/shoe from contacting the disc/drum, causing brake fade...