I generally enjoy raiding because in rather than only remembering things they also require (to varying degrees) good awareness, execution, multitasking, and are also an enjoyable social activity to me.
We’ve all heard people say “all you do is remember the strategy and just do that! Raids are so simple and boring!” But you’ve already seen that raids have variations in their mechanics that make us have to look at the screen and pay attention. Even though EX3’s wind phase has you go to the same spots for healer stacks and breaking your chains, you have to pay attention to the AOEs as well. The amount of variation depends on the raid: in UWU the only time you have to “look at the screen” in Garuda phase is if you’re a tank and need to see where the clones spawn, but in the current Savage tier there’s variation involved in almost every mechanic.
I enjoy the execution of certain mechanics, like how in phase 2 of ex3 we have to dodge the exaflares, then the half room cleave near the boss, and then as tank I press my mitigations and get into the tower immediately after. Other favourites are M2S’s Alarm Pheromones 1, DSR’s entire Nidhogg phase, and P5S’s Devour. If a mechanic is done the same each time but is fun to do (like dodging exaflares in DSR’s last phase) then to me it’s like how I feel when playing a fun song on guitar. It can be the same each time but is still fun to do.
And all the while there’s the matter of multitasking to try to play my job as best I can. How do I keep my GCD rolling while moving around to do the mechanics? Can I pay attention to my resources to be as perfect as I can with them? How do I handle the fact that sometimes during a burst window there’s tankbusters (like in EX3 after earth phase, or right at the start of M3S if not using invuln there) or mechanics (like in EX3 phase 2 depending on the phase 1 killtime, or a few times in Savage)? The raiding experience involves both doing the mechanics and playing your class well, especially in the third or fourth floor of Savage close to release, or an Ultimate that’s not old. I play a lot of tank so my rotation is often the same every time, but it’s still fun to me when I play DRK or GNB. I’ve been dabbling in healer and RDM and really enjoying having to get better at slidecasting, using my movement tools, and paying attention to the procs as RDM.
And I’ve also met friends through raiding and keep playing with them so that makes it fun too. Most people I play with aren’t like what Red-Thunder is describing, but there is the occasional crappy person out there that ruins things for others and gives people bad impressions about raiding or raiders. Everyone I’ve (personally) met who cares about getting 99 or 100 parses is well aware that it’s primarily about being competent at your job and then just getting a good killtime and good crits.