That's a common trope in cop movies/shows where the good guys shoot open a flimsy wooden hollywood prop door to rush in and get the bad guy. Its been seen enough in cinema that people will believe that.

Security doors would be any door on the outside of a building that requires security doors according to building codes. Schools for example.

Security doors are designed to withstand firearms. The deadbolts on those doors aren't moving unless you shoot it with a tank,