Why so critical of "universal" flex radiator hoses?

Dartswinger70 said
Y'aa are all full of ****, Ill run what I want on my car. yes I have a universal hose on a triple cored 6 cylinder radiator. I will run it untill I obtain the "correct " setup a-thank you.

It's your car...run what you want. IMO, they look like crap but they can and will work if you can't get the correct preformed hose.