I just hope the developers have implemented ways for those of us who can't devote large chunks of time to devote our smaller chunks of time to something meaningful.
I think the key to this ultimately lies with the player, and not the developers. A player in that situation decides on what constitutes "something meaningful".
I fall into the camp of a player with limited playing time. Even when I was a bachelor during my early days in FFXI, I didn't feel like it was right for me to commit sufficient playing time to do all of the end game activities and reap the rewards associated with it. Now that I have a wife, a toddler son and another baby on the way, I definitely don't have that kind of time. I knew with FFXI that there were certain kinds of end game content I was never going to experience, and I'm sure that will be the case with FFXIV. And I'm fine with that. To me, a meaningful accomplishment was probably something mundane and trivial to those who lived and breathed end game content on a regular basis.