Ever played XI?
Guess not, because then you would know what i mean by investing time:
Leveling a class alone before the lolAbysseaEXPtrain could take up to 200 hours playtime, not the first time, go for 400 on your first due to sublass+capquests+firstmaat, not to mention the time you need for more subclasses that had to be 37(of max 75 back then), which would probably take you a week (per class) if you got lucky with groups and 8+h a day to play - oh, and if you were a whm you better lvled that rdm/blm/smn and later sch for that. Pretty similar for other classes.
The time you needed to get certain spells for a class (Utsusemi:Ichi / :Ni were a long time BCNM drops only or the teleport spells or rdm Refresh etc.).
The time you needed to actually get somewhere. Hey, you just missed that airship? Oh, you better stand around and wait 6 min for it to come back and then wait another 5 to get to the city or you teleport (or pay someone money to teleport you if you didnt have a whm) and run for 5 minutes to get somewhere. Welcome to hellokittyonline where you can teleport everywhere
The time you invested when you wanted to craft something. Level a crafting class? Well, better get gathering mats then because the game doesn't shove up money up your ass so you can get started on your first craft nu-uh - not to mention that if you wanted to get to 100 on a class you better level 2 others to 60 or you couldnt craft cheap leveling recipes. Oh, and droprates on monsters in XIV are heaven compared to XI - or gathering rates. Wanted to make Darksteel Ingots? Well, you better run around a mine that has mining spots that everyone can mine and make vanish and have a random chance of 7.5% to get a Darksteel Ore - you need 2 to make an Ingot - happy times! 1 hour running around, if you're lucky you got 10-15 ores
But hey - it could be just different uses of "huge time" - because for me as an ex XI player XIV is a walk in the park (except the new red scrip fail) compared to anything i had to do back then
P.S.: And dont make assumptions about peoples age by reading a text - you're most likely to be wrong. Btw - they keyword is accessibility - not instant reward