This simply isn't accurate. By level 50, you should be using the same suite of CD regardless of the pull size. It will be some combination of Rampart/30% followed by your short CD and so forth. Small pulls give a false impression tanks don't need CDs because the mobs do hilariously little damage. In fact, a DPS can outright tank three mobs entirely on their own with Second Wind and Bloodbath. The only person really impacted by pull size from 50+ is the healer.
Now at 50, we can exercise some leeway if they're fresh. By 60, there is simply no excuse to pull less than two packs if not the room entirely. You aren't new and every dungeon is essentially the same just with a different coat of paint. Pulling less than that means you aren't a tank. You're a gimped DPS. You've had 50+ levels to get "comfortable". If you're level 71 and baby pulling Holminster Switch, either go back to the early dungeons and practice or use Trusts. They're literally designed for players to move at their leisure. If you queue into DF, then be prepared to deal with DPS and Healers who aren't interested in a slow run because you're "not comfortable." Is it selfish? Yep. Just like you demanding they accommodate your pace because "I'm the tank" is equally selfish.
In the end, do what the majority wants.
