On one hand, I help my LS out whenever I can, whether it be AF, missions, unlocking jobs (I've killed those NIN leeches more times than I can remember), quests (Kazham keys, RSE) etc.
I've put off levelling many times for those things, and if I'm out farming, I'll gladly help someone out if they ask for it.
On the other hand, my play time is limited, and if I helped everyone, then I'd have no time for myself.
Maybe I'm just jilted from having done a lot of these quests by myself (I've been playing for a year now), now it seems everyone is asking for help from hi-levels because they don't want to put the time and effort into it. They want to rush everything,
I remember getting the Kazham keys at lvl 25, with 2 others, took 8 hours, but we got it done. Same with mission 2-3, 3 melee, no WHM, got it done.
I remember killing leeches at lvl30 to get a carby ruby with others at the same level.
I farmed and crafted for weeks to buy RSE, then when I was a higher level, I did the quests myself. And it wasn't a waste of money, since the money spent on RSE, went towards other equipment later on.
No one really remembers the time that some hi-level helped them out, but you do remember the times that you got a group of same-level guys together and went out and kicked some ***, and quite possibly, made some new friends.
Keep in mind a lot of these quests were way before the lvl75 cap, when the cap was 60, and people were able to get it done back then.
Granted, I'm not going to turn down high level help if it's offered, but I'm not going to go out of my way to try and get it, and I'm not going to get pissed off if I don't.
Just my $0.02