Most bikes are not bassy it's mostly thumpers and harleys that are bassy.

Fair critisism.

Just wait until you get passed by a bunch of squids on sport bikes with parallel twins and I4s, those are much higher

I know, they attract idiots who refuse to keep the playtime to the track, and endanger everyone else.

an additional sensory input for the fuckhead texting on the freeway is not a bad thing.

The depends on the stimuli, a sudden loud noise as a bike zooms past a distracted driver is a TERRIBLE "sensory input" as you say, it could easily cause the driver to swerve causing a big accident which would not happen if not for the noise triggering it.

You could, and should argue that the distracted driver should not have been driving distractedly, I would however add that the biker should not have driven past at so high speed that they other drivers only notice them once they have passed.