True of course…BUT…sometimes one side will burn out & you don’t even notice it. Then a month or 2 goes by and the other one goes…then you notice it.
But you are right, it certainly could be the switch, wiring etc.
It’s not at all out of the ordinary for the low beams to go out while the hi beams are still in working order. You almost always use the low beams a LOT more than the hi beams.
Buy some new bulbs.