I hate that it makes me look like yet another all-talk-no-substance fair-weather Marxist but it's the only way I know to keep everyone involved safe.

Nah, you're making a decision that's in the best interests of the movement despite the personal costs of doing so. That's very different because you are making a difficult compromise to do what's right for organisations whereas fair-weather Marxists do what makes them feel good regardless of the consequences. In fact, in my opinion that's effectively the direct opposite.

I can sympathise with your frustrations though. My health is pretty trash. I'm not capable of doing much organising besides helping out with the local FNB-adjacent org here and there while providing some input to assist the back-of-house stuff like procedures and all that. I'd like to do a lot more. I'd like to be on the frontlines. But my circumstances do not allow it, so I contribute locally and to more international stuff like this site because that's what I am capable of, so that's what I try my best to do.

There's a place for everyone, even you. It sucks that the place that best suits you might not be the place that you most desire to be in. But contributing to reading groups and participating in the discussions is still very important - you have no way of knowing what you might inspire in someone else, someone who might go on to become leader of the vanguard in your region one day. You can still be a role-model and you can still have valuable input, it's just a pity that you probably won't get that direct feedback where you get to see your actions reap results directly. You know, Allende was instructed in Marxism by an old Italian anarchist bootmaker (anarchist comrades, I kid you not - on the matter of boots, Allende deferred to the expertise of the bootmaker [!!]) Allende would then go on to lead the only successful parliamentary revolution directly because of this anarchist bootmaker's guidance and, despite the coup, there is so much to learn from Chile under Allende. Even if it all went to shit afterwards. He dared to struggle. He didn't win but he gave it his best shot. Could this bootmaker have ever known how close Allende would get to succeeding? Could he have ever known what achievements he would inspire by his conversations with Allende?

So I guess what I'm saying here is that you have a similar sort of opportunity here. Treat every comrade you encounter as being the next Allende because you never know exactly what will grow from the seeds that you plant.