While I'm glad you appreciate my idea, my excuse for not having a rank 50 is that I'm trying to keep a fairly even spread of my jobs with the limited playtime my job affords me. There are plenty of reasons to have engaging content before you hit max rank. They could also be level capped so when new or returning players come along anyone could join the fun in running the quest/mission/battle with them.
SE is a business, they sort of make games to make money so their employees can keep roofs over their heads and food in their bellies. They have to take into account the entire player base. The so-called hardcores running about this forum have dwindled into a niche group. I like many others just don't have the amount of time to dedicate that we used to and it's nice to be able to make some progress if you only have a few hours a day. There are a great deal many more people in that boat than those who can literally play the entire day ( which I do on occasion on the weekends if I can get away with it).
You seem determined to bring back the glory days of Uber-Elitest FFXI days, when people would be kicked from parties for not parsing high enough or never get an invite as they weren't the right job or didn't have the most perfect gear. Where people would literally sit there and talk smack at each other for hours waiting for a HMN to pop at 5am in the morning NA time. People would be regularly ridiculed for trying anything new that deviated from what became the standard way to play the game. Where your LS commanded as much of your time as your RL job if not more. I know these are the things the "hardcore" crowd get off on and I have to ask, do we really need that again? Wasn't 8+ years of that enough for you?