It’s a habit that’s easy to build if you’re used to windows. Windows really likes to let applications (including task manager) prevent you from shutting down. Especially on slower machines, it will often fake you out by giving you the “shutting down” screen without telling you about the application it’s going to fail to close until like 30 seconds after you hit the button, so you come back to a still-on machine.
It’s a habit that’s easy to build if you’re used to windows. Windows really likes to let applications (including task manager) prevent you from shutting down. Especially on slower machines, it will often fake you out by giving you the “shutting down” screen without telling you about the application it’s going to fail to close until like 30 seconds after you hit the button, so you come back to a still-on machine.