Disclaimer
Not trying to blame anyone here. I‘m just taking an idea I‘ve read and spinning it further:
Intro
A lot of people use free open source software (foss), Linux being one of them. But a lot less actually help make this software. If I ask them why, they always say „I don’t have the coding skills!“.
Maybe its worth pointing out that you don‘t need them. In a lot of cases it’s better to not have any so you can see stuff with a „consumer view“.
In that situation you can file issues on github and similar places. You can write descriptions that non technical people can understand. You can help translate and so on, all depending on your skills.
Other reasons?
I‘d really like to know so the foss community can talk about making it worthwile for non coders to participate.
It’s super hard to know this and there won’t be a consistent answer because everyone is different. You have to meet people where they are.
I think you did answer your own question on this one. I’ll also say that as a somewhat technical user but still not a heavily technical user like some people here, GitHub is a really baffling website. It’s hard to even figure out how to download something from it. I would strongly encourage anyone who wants to reach non-technical users to avoid GitHub. It’s made for programmers and it doesn’t make sense to anyone else without training.