The comic is about not criticizing people who want to see improvement in something in which they participate. It isn't saying hypocrisy can't be criticized, just that we shouldn't misidentify hypocrisy. Notice the characters aren't saying that no one should buy an Apple product/car or participate in society. The replies are tangential to their original complaints. In order to see hypocrisy, the replier needs to view any participation as a full fledge endorsement, which is a silly thing to do.
Meanwhile, OP genuinely is acting hypocritically because they are doing the exact thing they are criticizing, posting an option to the Internet. The original replier is therefore not the one embodying this comic, it's you.
The interesting thing about HN in that context is it doesn’t fine-tune its algorithm per-user, it presents a consistent view to all users. Content should be much less positive-feedback-loop because of that.
And so OP might not be hypocritical if that consistent-view is the change we need to better our society.
OP is talking about very specific kinds of opinions here, not forum posts. Other than that, a librarian often has to talk out loud in order to tell people to keep quiet.
Interesting that you do not feel the need to lead by example.