Why do JRPG have such stupid save systems?

[Torillian]

S.T.A.G.E. said:

Torillian said:
I think that save systems that allow you to save whenever you want would take away some of the difficulty and tension that comes from some JRPG battle systems. The fact that Persona 3 only lets you save at certain points means you have to be careful and figure out whether you have the resources to make it to the next checkpoint. I think I prefer it that way.

What if you have something important to do and you have to leave, but you want to save immediately, without being near the check point? A save is a save.

then you leave the dungeon instantly and save.  You weren't able to make it far enough up the tower to save inside it, but you can always leave the tower and save whenever you want.