Why did SE decide to make the three new classes not require base classes?

[Teslo]

Bard would be worthlees for anything without the base skills earned from leveling ARCHER. THis gos for the ALL the JOBS. Take way the base ruin, the job. PLD with almost no attacks? Whm without cure?

For some reason you seem to think that Job = The 5 abilities that you quest for over 20 levels. This is the main issue with the problem you're having here. The Job is a culmination of abilities brought to it by the classes and enhanced by the 5 abilities you think are standalone. Note: Enhanced. If you were to remove the "Classes", the "Job" would then include everything you learn up to level 30 as well as everything you learn past level 30. That's it. I'm really beginning to wonder at your ability to ... you know... think.