You can learn computer science, programming, physics, chemistry, english, psychology and more...in your own home. You don't need a B.A. or a B.S. for that.

You cannot learn the skills companies like Siemens are offering like that, definitely not in a way that would get you a job.

Closest to it is how my dad got started, by tinkering with motorcycles in his youth and eventually getting a start in manufacturing, but it was a really really long time before he got a decent job.