Why is endgame loot capped?

[Ransu]

Should the FFXIV weekly loot lockout be by job instead of character-wide? That still does not let a character get everything they need in a single week but does allow all jobs to get geared faster.

It also wouldn't need to apply to the tomestone cap, which could remain character wide. That would encourage more participation in content for getting the actual gear drops instead of just grinding the most efficient tomestone source to cap then calling it quits for the rest of the week.

Something in the line of gear type since jobs share gear.