Think of it this way.

FFXIV is just like any other MMORPG where you would use alts for different classes. What's different, is that those who are too lazy to level up new characters, can, for a penalty (i.e. the myth cap and dungeon lockouts), have their 1 character capable of being all the different classes.

If you want to get away from the cap and lockout, then just play FFXIV as if the job system doesn't exist. :3

(Note that if we subscribe long term we get Standard benefits at Basic rates.)