but Tom probably meant it was not anything to get much alarmed about. It is a bit a matter of semantics, given how interrelated are the tectonics of the faulting and the volcano.

Maybe the magma shows up in volcanoes where there is an easier path through the crust - i.e., where the crust is more faulted. Maybe the crust faults in the vicinity of the volcanoes, where the elevated temperature have weakened the rock.

Sort of like the question of whether a particular much later earthquake is an aftershock or an event unrelated to a prior event, partly a matter of statistics and semantics.