You've quoted a single sentence then ignored the second paragraph where I explained things even Jon Stewart famously pointed out:
https://youtu.be/SqRt8Lbk5eY?t=387
It's easy to "fail to see" when you do not look.
We appear to be talking about different topics entirely. Your points seem to be about the effectiveness of political involvement, but the comment you’re replying to and the quote I posted relates to political involvement.
It’s encouraging to hear stories about how people get involved. We can learn about the process, network, and have an impact, even if that impact is incremental.
Edit: Clarified, added second paragraph
I fail to see how it’d be any more difficult to get involved in politics for candidates that don’t meet this criteria.