Lots of people. Lots of people also buy electronics that have such poor-quality electrolytic capacitors that they will self-destroy in five years, even if rest of the device lasts much longer.

That's a good example. That people will buy them unknowingly. But we can avoid that by informing.

I don't think any brand willingly put bad capacitors in just so that their products can self-destroy though?

I think this actually is at least semi-conscious/willing. Better capacitors cost a few cents more, but not that much more. But if the equipment is discarded after a few years, perhaps the manufacturer can sell a new one.

Just recently observed this in a ten-year-old Viewsonic LCD monitor: the power supply capacitors needed to be changed, then it was OK again. It's a relatively simple repair operation if you know how to solder.

People buy iPhones despite Apple's ability to revoke any app whenever they choose.

I actually think Apple users considers that as a good thing. Self destructing computers is entirely different, unless it's a hard drive feature.