I understand. I've never said totally don't do it at all either. I am the sort of student who learns by going to class not knowing anything, and forming my own understand of how it works. Such is the education system in my home country. I was raised not needing to know anything, and going in and learning things, and coming out on top. I don't understand much if I were to read the topic before actually going into the class, but I understand so much more once it's actually explained to me. Similarly, I don't think it's a bad idea to watch a video/read a guide, and at least give yourself some sort of idea. But the community here seems to expect that people have studied said videos/guides extensively, and are able to clear it. Such is the level of patience we people here seem to have.
Don't get me wrong, I don't think being lazy is good either. I say there's a difference between being new, and being incompetent. A new player wanting to go in blind, I don't mind. I explain the ropes, as long as they are willing to listen, I give them that. But if you have failed multiple times, and still refuse to listen to me, that's where I draw the line. In that sense, it's like two people going in a class knowing nothing, but one student attentively listens and take notes, and the other just sleeps in class.
I have always fought for the welfare of newer players, and people on the OF seems to clump new and incompetent together, because they don't have time to waste on people. I didn't think people could be so self-centred, that they'd just step on others, at the expense of their welfare. I suppose that's how it works in life too. But this is a video game, not life.
I once read about how being a newcomer in a knitting community, you'd be welcomed with open arms, and taught the way of the needle. Video gamers simply berate others for being new, and turn them off. And slowly it forms a vicious cycle, the community begins to be filled by more toxic players, and new players aren't coming in as much.
As you have stated, it's a mentality problem. I find JP players are more tolerant to newcomers, and inexperienced players. If you make the same mistakes over and over again, and show no sign or drive to improve, they'd get angry too, and they have every right to!
I'd rather take my chances DF-ing with Japanese players, even though I speak really minimal Japanese, than to join a PF "exp clear onry" party, because said PF parties usually place absurd expectations on their party members. And a lot of the time, these people are taking their chances to wing it too.