To be fair though, he does have a point to an extent, and the raiding tier as of now only exasperates it to a degree that it's become such a big issue for the community (this wasn't as evident of a problem during 2.x coils). It's not just alexander, but content in general; the older it gets, the harder it will get to find people that are interested in doing so, especially if it's not in a proper gating or curve (bismarck EX for example, there's absolutely no incentive to do it again except for shiggles, it doesn't even have a mount drop).
In the case of gordias savage, it's not up for debate that it's hard, probably too hard for what the intended audience is (it's supposed to be the raiding difficulty for statics to jump into, compared to SCoB savage that's meant to be hard). One of the effects was that its broken statics due to them stopping a wall...usually ones that are composed of group of friends or otherwise non-serious raiders. It creates a bit of a rift between wanting to play with your friends and getting content done, and no one likes being stuck on the same fight for 4 weeks. Another one was a large amount of players transferring off their server to a larger one with a bigger raiding scene, enough to the point that even Yoshida has admitted is the case for JP servers, doubly so for our servers that have a relatively worse raiding population (and from my observations on my server, it's one of the smallest servers there is and you'd be hard pressed to even fill a PF for learning.
Combine both aspects, you have a diminishing population on most servers, as well as loss of interest for lower floors like A1 and 2, it's hard to play catch up to a raiding scene that's tuned so high.
This is my circumstance as well. Fights like A3s are just outright unfriendly to subbing even a single person because you need everyone to be on board on the same strat and positioning from start to end. Even if you get in someone who has already cleared it, a misposition during protrean wave, or a mishandling of last phase digities can mean a wipe, and these are the sort of things that require you to know who and what your party does.