It's your vision and you are completely free to have it, obviously, but you should not project it on every tinkerer out there - like you did in your initial message. Yours is actually an extreme position that's probably exacerbated by the digital and immaterial world, where you can accumulate cruft and unfinished projects easily. But many tinkerers, especially in the physical world, do projects to use them personally and not only for the sake of tinkering.

Many tinkerer projects in the physical world are actually maintenance work of physical appliances that are not working anymore as expected or can be extended to do more or better things.

Lots of physical world tinkerers also have a garage or workshop full of uncompleted projects that went from being fun and interesting to boring and abandoned.