Sorry, but I'd like to put an end to this pointless back-and-forth.
I actually agree with what you're saying: if you own a bike, you should know how to maintain it. But what I'd like people to understand is that not everyone's situation is the same.
I use my bike pretty much every day: for commuting, having fun, training, and everything else. And please don't tell me I should own eight different bikes for all those purposes, because first, I don't want to, and second, I simply don't have the space. I am not telling others what to do either. Other people, other priorities. And other choices.
As for maintenance, you will probably not trust me, but I know perfectly well how to change a tire (I've done it several times), replace brake pads (done that too), bleed the brakes (the only reason I haven't done that myself is because I didn't want to risk making a complete mess in my garage) etc.
One piece of advice, for everyone: please remember that people don't necessarily tell you every detail of their lives. Not everyone's home, family situation, finances (fortunately that's not my case, but it may well be for others), work commitments, or circumstances are the same.
This constant tendency by some forum members to lecture everyone else makes the atmosphere here far less constructive.
I'm not the only one who's noticed it. How about trying to make this a more understanding and empathetic place? After all... come on... we're talking about bicycles, not how to survive a war or cure cancer.
A slightly more relaxed, helpful attitude from everyone would go a long way. Yes, I already know the reply:
"Well, you're the one who..." Fair enough, maybe that's true, and if so, I apologize.
But let's all try not to turn every request for technical advice into a territorial pissing contest.
Thanks, and apologies for the rant. I'll leave it there unless anyone has something useful to add about the actual technical issue.