Why is plastic surgery/ augmentations/ lipjob nose job considered as wrong ?

No i am not saying #mybodymychoice ..i am just saying that the standards of beauty is so high and admit it that they are given much more privelege in terms of opportunies in personal and professional life , and in day to day life ..they dont have to suffer teasings .
Now i would never change anything of my body , not that i am not conscious of or proud of it but my priorities are different .but people who are into showbiz must not be shamed for it .
They really shouldnt be .