Another joy of trying to repair white goods is the good chance of multiple lacerations due to nothing being deburred anymore.
Same is true of PC cases (at least at the cheaper and 'home' end of the market).. stamped out and thrown together by Chinese children who, I can only assume, must have arms that look like they self harm from all the razor sharp edges..
Which in itself is a good reason to avoid them, and go for better quality ones. That and the sometimes suspect PSUs. When you're paying £8 for a case with PSU, shipped halfway round the world, finishing and safety (against sharp edges) aren't top of the agenda
Aside from a flirtation with BTX about 15yrs ago, self build cases haven't changed in the last 25yrs, so if you're into self build, it makes sense to invest in a decent case
That said, for 99% of buyers, self build doesn't make sense nowadays, and probably hasn't for 10yrs or more.