That was true in Endwalker as well, due to having 7 Extremes, 12 Savages, 2 Ultimates, 3 Criterions, 5 Unreals ]
For every EX/Savage/Criterion There is a normal trial, normal raid, and a variant. A lot of these are also "one-and-done" content for raiders.

Also, EX/Unreal is HARDLY raider content. Most EXs can be done in one to two sessions in party finder. These are for casual players to get their toes dipped into some harder content. High end raiders are generally not entertained by these. But on a patch by patch basis, 7.0 came with 4 savages and nothing else. 4 savages for 4 months. Groups were done with there in two weeks and then recleared for an hour a week. The ultimate has a bit more longevity, but not much incentive for reclaring (7.1). Chaotic and Ulti were the only two pieces of raider content in 7.1. 7.2, we have forked which required a LOT of prep and isnt even for most raiders, but for hardcore field-ops enthusiasts. And then 4 more savages. For 8 months this time since there is very little to challenge raiders in 7.3. Consider that.

Really what do you think raiders are doing now? Reclears on tuesdays and then nothing.

I agree with pretty much everything else you said.