I completely understand people wanting to excel in a field, politics, art, music, acting, business etc. If their aim is to excel at their chosen area, and further it in some way, then the recognition is well deserved. This is the type of fame that actually has an impact, and will be remembered for a long time to come.
I don't understand, nor do i have time for any of these 'celebs' that just want to be famous because of vanity, needing to be the center of attention, or just to live 'the high life'. Sure they might be noticed by people during their lifetime, and be well known during that period, but they're replaceable. New ones will pop up, and they will be forgotten and brushed under the carpet in due course.