[notact]

Sure it gets progressively easier as more and more of the door rides horizontally on its rails. But those first few inches where the door is nearly entirely vertical, must be some significant fraction of the total weight, probably >90%.

[LoganDark]

Not to mention you have to get your fingers or something underneath the closed door in order to begin lifting it in the first place. So the "from the ground" part is not insignificant.

[ComputerGuru]

All garage doors I’ve seen had a heavy yank handle on the inside.

[LoganDark]

That handle's for when the springs are working. It's probably not going to lift hundreds of pounds without breaking.