There is no college on the planet that is going to force a student to accept an ED offer of admission, and insufficient financial aid is one way that students can easily say NO. And yes…it is that easy, and students do it every year.
I’m not sure what you are trying to convey to the OP.
Personally, I don’t think anyone with financial constraints should apply ED. It eliminates the ability to compare net costs. And for those with financial concerns, comparing net costs can make or break them.
But who decides? The student and family ultimately decide…because NO school is going to send the ED police to someone and force them to attend any college.