you will never learn without mistakes

You know those cliche-type, so-called wise phrases? I don't know about what others think and frankly i really don't care, life's too short to care about what others think anyway (well, for some things...) Aaaanyway, enough ranting here's my favourite phrase that's just wrong:

"You'll never learn if you don't make mistakes" As if we make mistakes on purpose? Or worse, that we should be?!?! please!! Mistakes may not be 100% synonymous with accidents but we all get in a slump and make mistakes not at our own will. It just happens as life runs down the dark-ally! And yes we ALL learn from our mistakes but that so-devised phrase definately deserves a bullshit tag