I do agree with you, however I haven't really found minx to need a free edge,
I used them on my 10 year old daughter recently ( who obviously doesn't do much housework etc ...unfortunately lol)
She is a nail biter, so i put them on to try and kerb the habit... Her first set stayed put perfectly for 1 week then we removed them and put a new design on... again perfect for a week untill we removed them, she now has gel on .
The same night I did hers I did my own nails Reasonable length, not too long but just slightly past my fingertip... Had to take them off the next night as I ruined them.
So in some cases free edge really doesn't matter.
Same with toes I think, The longer they are the more likely to rub against shoes etc...
Obviously a severe nail biter there probably wouldn't be a point !