I would play with 5 solo "generally better" players over a 4 "generally not better" premade all day.
Expecially if the bot lane is involved. I have never saw a bot lane falling more rapidly than the premade ones.
You really think that some divas who don't trust to play with strangers are BETTER only because they are playing with some random "friend" of them who they may not even saw once in their whole life?
Well, they are really not.
And deep inside yourself, you know this is real.