I never had problems gearing up myself or the 30ish other people in my guild when i played wow.
In this game you could literally go a full year of running av/cc every single day for 4-6 hours a day and still not even have 15 people fully geared in that amount of time.
Yes wow had rng so does every single game, but wow handled it in a much much better way then FFXIV has so far.
I still personally don't like wow's 1 week reset timer since i felt it caused lots of downtime between actually doing content, but the current system in FFXIV with 15 minute reset timers just forces drop rates to be low and forces people to have to run the same content possibly 200-300 times before they see certain items drop for the 1st time.
For example i think i have personally done 400-500 AV runs (i lost count a long long time ago) and i have only ever seen 3 corselets and 1 heavy darklight body drop, that means if i were to fully gear out a 25man LS with those items i would potentially need to do 2500+ AV runs.
Wow's drop rate cant even be compared to that.