Get a glass and smash it on the floor
Ok, done
Is it broken?
Yes.
Now say sorry to it
Sorry
Is it fixed now?
Of course not!
So sorry wasn't good enough?
Well, no but-
What about glue? Can you fix it by glueing it back together?
I can try
Can you still see the cracks?
Yes
Will it hold any water? Will it still fulfill its purpose?
No, but-
Why not?
Because it's broken
Because you have broken it
Oh
And it will be broken forever.  You couldn't fix it by saying sorry.
Oh
Will it still be broken if you walk away?
Yes
So you leaving won't fix it?
No
Will anything make it the way it was before?
No