Depends on who is making it.
For myself, I will now sometimes allow an intersection that is 1/8 inch off stay if I can't get it any closer. After a while, i am able to more or less ignore it
There are so many places in the process of making a quilt where things can go awry.
there really no substitute for experience to learn what works - and when to redo or abandon a project when it is not working.
I'm still in the trial and error phase of quilting.