Fair point! However, your argument is almost more reason for Google to do it.

You find yourself on YouTube for those niche videos, which means you're the kind of customer YouTube would benefit from getting rid of. A few dozen views from you per year to find niche videos, is not paying them anything, and is wasting a ton of storage. They want people who spend hours upon hours on YouTube per day, essentially replacing TV. Those who spend hours and hours on YouTube, are also generally watching popular videos, or videos that YouTube is recommending, which means a ton of ad views, or even YouTube Premium subscriptions.

I would absolutely be crushed if YouTube deleted all those random niche videos because I just used one last week to fix my car. Some random ass video showing a potential ground wire issue. I am not saying I want Google to do it, I don't, but I am definitely shocked they aren't.