Hard to imagine how a light bumper bender accident would cause that unless there's an external oil cooler up there (even then??). Have a look anyway. Hopefully a manual pressure test will point to a bad pressure sending unit or a burnt/bad wire in the region.
If pressure is still low after a manual pressure test, I'd probably try another filter just in the odd one-in-a-million chance you won the bad-filter lottery. If the symptoms persist likely causes could be:
1) Cracked oil pickup tube O-ring, #2 below.
(fairly easy fix)
2) Clogged oil pickup tube screen
(fairly easy clean/fix)
3) Cracked/damaged pickup tube
(replace)
4) Oil pump or stuck pump pressure regulator (you could try running some mystery-oil or cleaner through it)
5) Oil galley plug fell out (unlikely)
6) Bad bearings (caused by zero oil pressure from a bad filter)? You'd hear noises though.
7) Bad cam bearings
What a clogged oil tube pick-up screen (#5 above) looks like:
IDK if it's possible some sludge could get knocked loose inside the engine and clog up the screen. Cracked pick-up tube seals/O-rings isn't unheard of on vehicles (any make), and would do just like you're experiencing as the oil thins and engine speed is low (can't draw enough oil). Usually pressure will drop to like 4 or 6 psi. At that pressure your engine probably wouldn't rattle. And the pressure would go way up if you give it throttle (it draws more oil through the tube).