If that were true, then they wouldn't be duoable by a single Tank and a single Healer. Even when we were running around in iLvl 50 relic gear it was one groupable. You wouldn't see tanks rushing through with a single healer on autofollow if the content was truly Full Group content. But then you'd see the roadblock right there instead of at Titan HM. They intended for mostly everyone who can use a mouse and keyboard at the same time and both sides of their controller to complete the content.
That means it can be sped ran by those players who are a little better. Also I don't skip cutscenes. FFXIV does that for me when I've already seen them. Its an option. Not a glitch, not a hack, not a bug, and not an exploit. So sorry they were meant to be skipped if you've seen them. And sorry to say, but everything up to Ultima Weapon is trash. That includes Nero, Gaius, and the Colossus. Its not very often I do much more than Cleric Stance, Holy, and Stone 2 in those fights.
And since we're able to run these things for Mythology, they are meant for running again and again.
Now.. it is a bit of a double edged sword. I don't tell anyone to skip the scenes. I never do that. I even tell people who get upset to shut up and leave the newbies alone or leave. As long as we have one tank and one healer (usually me) that isn't skipping. We can just continue on and let them watch the cutscenes. I have no problem with that. I can solo heal those dungeons easily and usually in Cleric Stance the whole time even then. They'll be ported to us at the important parts (right before Gaius and Ultima Weapon).
So yeah, players caused the issue. Players can fix the issue by just being nice to each other. We're not in elementary school anymore where we run from the playground to get the teacher to intervene (course I grew up in the early 80s, they didn't intervene much since they were on their smoke break). We gotta step it up ourselves. And that's exactly what I do. Typically the tanks don't want to tick me off, and the DPS are expendable. So usually groups do what I tell them. Just got to get more SCH and WHM to get on board and a few good natured Tanks. Well the Good tanks already are. The mean ones are peeps that want fast queues and suck anyway (aka cure 1 pulls agro).