Why do people try to get skin advice of others?

i found that you just can't, you may have the same skin type but completely different skin. you really have to go out and buy and try and experiment on your own. i have combination/oily skin. my friend has pretty much the same skin type and issues as me. she told me to try st ives apricot scrub because it was amazing for her, i did and it broke me out the same day i used it. i remember waking up at 1am going into the bathroom and looking in the mirror like WTH?! so i used this redness tamer wash and it helped a little but i never broke out like that until i used the st ives