If you are driving at night, and aren't sure if there might be a dangerous obstacle hidden behind some glare, damn right you should make a gentle brake check (to warn people behind you) and start shoulder checking for exits in case it gets weird. Defensive driving means you have a positive plan to navigate safety. You can't blindly assume your path forward is default-safe. Or you can yolo and risk being part of the 40k dead and countless maimed every year.