I'm not being condescending. SSD and PSU are like the most important parts of your computer that you can't risk failing.
The average person doesn't back everything up once in a while, and they shouldn't have to. It's a massive inconvenience.
HDDs have been proven to be prone to failure. You must not be in the computer spaces that much because people complain about HDD failing on them and have been doing that for years. Everyone who owns an HDD can tell you how slow and scary it gets sometimes.
From a technological standpoint, SSD is like far superior. Faster data access, boot times, and file transfers. In a pure cost to performance ratio SSD is just plain better.
You're telling OP to willingly handicap himself and put himself at a risk of data loss (extremely common, if you didn't face it YET you got lucky) and inconvenience himself by constantly backing up data. It's just a bad advice, I'm not being condescending. And I say this to you as someone who lost literally all the data and ended up with nothing on project submission date, you should never store anything important in HDD. It is absolutely not worth it.