Speaking of throwing a tantrum. If you're going to throw one yourself and accuse someone of not reading, perhaps you should take your own advice. While yes, I did use Expert as an example. I specifically said 70+ dungeons in the very post you quoted. Funny how you conveniently missed that part in your little rant.
With that said, you can scream it's "not the norm!" all you fancy. It is on NA and EU datacenters. We simply have a different philosophy here. Whether it be 90—erm, I'm sorry, that seemed to trigger—89 or lower, tanks will overwhelming W2W. If they don't, it'll be a two pack pull. The only exception you'll see are the super pulls from ShB, i.e: Qitana and Mt. Gulg, specifically. So, no. Your point doesn't stand. You're trying to apply a JP philosophy onto NA and wondering why you're getting push back. Bit ironic considering one of JP's criticisms of NA is doing precisely that.
Now for the portion of your post I highlighted. To be entirely blunt here, if you aren't pulling two packs above 70 (honestly, it should be above 60), you aren't capable of tanking. Which is perfectly fine. Just go practice in lower level content until you get better. There's nothing wrong with lacking experience. There is, however, when you queue into content above your experience and demand everyone conform to your preference. Now if the majority of people want to pull small and sightsee, more power to them. The odd person out is the wall puller, thus they should "take it up your... back" as you so eloquently put it or eat the 30 minute penalty. Even as a tank main, I'll abide by the majority. If I'm not in the mood for a sightseeing run, I'll just leave and do something else for 30 minutes.
All of your mitigation being on CD, generally, means you don't know how to tank properly and should practice cycling your CDs in lower level content. There are exceptions of course but they are rare even with a healer who doesn't use oGCDs. Conversely, you could use the Duty Support system. You know, that feature literally designed for players who want a slow, RP-esque experience without having to worry about random player interruption. Use it. You wanna know what's frustrating? Players who refuse to use Duty Support because "it's too slow!" or "I play an MMO to play with people not bots!" Only to then get mad when said people have differing preferences.
At the end of the day, a tank pulling one pack is nothing more than a gimped DPS. Your role is literally useless. You aren't needed whatsoever. The Dragoon with Bloodbath will be just as efficient tanking as you will be due to how little damage three mobs actually do. You keep calling W2W a "speedrun." Actual speedruns drop healers entirely. Most dungeon from at least Stormblood up, can and have been W2W without a healer. Even Dark Knight can W2W a good chunk of dungeons without a healer. So if you don't even need a healer, period, when pulling 6-8 mobs. Imagine how paltry the damage is to a tank with only three mobs? In fact, you want to know how bad single pulls are? Urianger can heal the big pull in Mt. Gulg. Not the ridiculous super pull but the first wave of nine mobs? He can handle that. So you pulling one pack there means you're less effective than a bot.
The irony is by making mobs so non-threatening, the devs have inadvertently encouraged DPS and Healers to pull because there's next to no risk in them doing so.
These are the exception not the rule. Even a "Cure bot" can keep a tank alive unless it's Cure I. In which case, I'll explain to them why they shouldn't be using Cure I passed level 30 for the most part. On the rare occasion they refuse, I'll either leave or Vote Kick. I'm not going to single pull because I have a WHM who refuses to utilize their kit. At that point, you're griefing your team and should stick to Trusts. Obviously, this applies to higher level dungeons. I don't have this expectation in say, Stone Vigil or even The Vault. Mt. Gulg though? I can appreciate you struggling on the super pull, and will back down from that. If you're still spamming Cure I by then though? That's just griefing. It's little different than queuing into the dungeon with 60 gear.