I teach automotive and i would say that is a problem with the trades in general, people assume they are low-skilled low-paying industries and dissuade young people away from it. Most people who end up doing it seem to have some familiarity through friends or family. Hardly anyone truly 'takes it upon themself' to go learn something they have zero context of, and schools aren't giving it to them!
On the plus side, i think automotive at least is currently experiencing a bit of a rubber band effect where it's been so understaffed for so long (at least, of people who understand ohm's law for example) that the money is finally flowing in a rush to get people into the industry. So it's a good time to get in, especially if you understand electricity. But i also get the impression several other trades are ramping up even faster.