Car accidents (including a car hitting a pedestrian) is certainly a problem but I just don’t see how someone could genuinely dislike pickup drivers for a reason like that. Seems like a conclusion in search of a reason.
The trend towards BIG is a major part of that. Compare, for example, the classic Toyota Hilux to a Ford F-150. The latter is substantially taller off the ground and, given how much of the driver's view is blocked, much less safe in a residential area than the former.