God only likes pretty priests

Leviticus 21:17 says, “Speak unto Aaron, saying, Whosoever he be of thy seed in their generations that hath any blemish, let him not approach to offer the bread of his God.

21:18 For whatsoever man he be that hath a blemish, he shall not approach: a blind man, or a lame, or he that hath a flat nose, or any thing superfluous,

21:19 Or a man that is broken-footed, or broken-handed,

21:20 Or crookbacked, or a dwarf, or that hath a blemish in his eye, or be scurvy, or scabbed, or hath his stones broken;

21:21 No man that hath a blemish of the seed of Aaron the priest shall come nigh to offer the offerings of the LORD made by fire: he hath a blemish; he shall not come nigh to offer the bread of his God.”  So, if you are not perfect god doesn’t want you as a priest?  If god causes all things to happen why would he cause a son of Aaron to be blemished to his sight.  Wouldn’t these things be gods fault?