How old are those houses? They probably are not compliant with current building codes[1], many places require your garage doors (and ceilings) to have higher fire resistance than the rest of the house. In my experience, fire-resistance correlates to sturdiness in doors.

1. I know it's a broad generalization, also location-dependant

Latest codes have backed off of that. Doors that can meet the old fire doors had closing springs set so strong the elderly couldn't open them (or couldn't get in with packages after getting it open)

I don't see anything in your comment that suggests the latest codes have backed from high fire resistance - which was the thrust of the comment you replied to (garage doors have become sturdier, and glass has low fire resistance)