In context, he did say "people would be able to access the content they want WHEN they want." Not everyone wants the same things.

It's just a matter of where you're willing to draw the line with this "jumping potion."
Also, you have a strange concept of "solo." :P
Leveling might very well be irrelevant. But it is not the same as content. You can level to 60 without doing any quests or story. What you're asking for is a skip button on 90% of the game. Just try to picture the abuse that could cause on the game. RMT, day 1, farming Stormblood areas. Trolls, day 1, monopolizing content. You'll have an entirely new breed of people that will not care about the integrity or balance of the game, let alone the "spirit of the game," which I never mentioned. And why should they? It's not like they played the game to get there.