What kind of a PC do you have where you can just do a hard shutdown?
Doing that on any regular system can totally screw up stuff. Unless you are running some sort of funky read only system, or one of those fake write systems, a hard shutdown is a bad idea.
Also with modern hardware it’s less of an issue, but with anything with moving parts, shutting it down properly can make sure those parts aren’t moving any more and secured for transportation for example. I remember back in the DOS era, we used to park our heads before shutting down the PC.