Okay, I'm stopping reading here to start replying, because there are already numerous problems with your reasoning:
* In the case of gay marriage, many of the people fighting for it were not, in fact, gay, and were not personally affected. Why does that matter? There were white people fighting in the civil rights movement for black rights, is that somehow lesser? Why is fighting for others a problem?
* Climate change already has, in fact, displayed some impact on most people by now.
* The fight over climate change is focused on the future, it's focused on prevention of larger harms, we're talking about a timeline that includes decades. Waiting until things are already a total, unmitigated disaster and then doing something about it would obviously be deeply stupid.
* Social justice issues actually do affect tons of people -- my wife, being a woman, is affected by various problems of sexism. Women and girls comprise half the population, add in basically any ethnicity or sexual minority and you're already at a majority of people.
* Again, even if you're personally the whitest, straightest, cis-est, male-st person possible, what's wrong with standing up for the rights of others? How is that disturbing in the least? I think you may be confusing "disturbing" with "encouraging" or "inspiring".
> Interestingly, most of them do have one thing in common: lack of highly marketable skills or professional weight.
Imagine someone making an identical argument for MLK's march on Washington DC, or for the broader civil rights movement at large. This is basically a character attack designed to deflect from the actual problems they're protesting. "These people only protest because they're losers!" is basically the message you're sending here.
If you look at social conservatism as a whole, this is basically always the argument, the way that history is rationalized. As soon as they lose one fight -- women being able to vote, civil rights movement, gay marriage, etc. -- the mantra suddenly goes from "okay okay, fine, [last change] was totally a good thing after all, but [new change] is completely crazy! For real this time!"