Is it really necessary?

Sometimes,i really wonder,is it really necessary for a person to fall before he/she can learn a lesson in life? The conclusion that i have for myself is that i do not see such a need at all. I strongly feel that simply going by other people's account on certain situations is already informative enough for me,more so if they are negative in nature..there simply is no need for me to go all out to try them for myself before i can conclude if something is truly good or bad,beneficial or harmful. If it was really necessary that we try out everything in life just to get a feel of it,then why the chinese saying "bu ting lao ren yan,chi kui zai yan qian(ignore the advice of the elders and you will regret it)" ? Seemingly this sentence is telling us that the advice of the elders.going by experience is something that we should seriously take heed of. Why then can't we just go by what others say?? Some may argue that you need to feel and experience something for yourself before you can truly draw a conclusion..well,i say that it is true to a certain extend but we always have to bear in mind that there are times when after obtaining the experience we want,it is already too late for regrets. So in summary,i feel that all these is a matter of choice but if i were to say something about it,then better to try out the good things than the bad as ultimately,in the worst case scenario,something supposedly good will only turn out to be not as good as it seems while something supposedly bad may just end up being your WORST NIGHTMARE.