Wellp, if EDCing a light like that, it’d be turning on, off, on, off, on, off, etc., in your pocket all day. I’d rather it be that much harder to accidentally turn on.
And having to lock it out, whether physically or electronically, is even longer to turn on than even a longclick.
Besides, on the ’B, a fast doubleclick goes right to turbo anyway, and a shortclick off.