Could it be because of the history of radio and early electronics being full of inventors getting ripped off by unscrupulous parties...?

Hurt people hurt people, as they say. The entire field is held back because of trauma. "I could invent something amazing but get screwed out of it because someone else has money and lawyers" is just no way to live. The problem for radio is I could invent the most magical amazing transmitter, but it's worth absolutely nothing if there's no corresponding receiver. Which is to say, open standards are everything. Meshtastic/MeshCore/etc are interesting because they're open. It doesn't have to be. Off-grid mesh communication is a solved problem, just buy a GoTenna. Problem is it's proprietary. But it works, with a whole lot less drama.

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