would this not be a good idea for a start up company that recycle computer parts?

I really don’t think so. Computer recycling already seems to be a low profit business, as evidenced by there not being any large companies that do it (that I’m aware of). This number of computers flooding the market would probably make it even less profitable. Sure, it may be profitable for some small businesses, but nothing on the scale required to address the problem.

Don’t manufacturers purposefuly destroy the computers and such just to ensure that doesn’t happen?

There are dozens of us out here patiently awaiting a bunch of reasonably powerful new Linux machines.

that’s what the greatest technician that’s ever lived does.