Can someone please explain to me why it is ok to go into a jam p

Swainton - Can someone please explain to me why it is ok to go into a jam packed Walmart or other large store but is too dangerous to vote in person ,only safe way to vote is by mail.Please someone explain. Only explanation I can come up with is it will allow more illegals to vote and maybe get citizens of graveyards to vote..But this is NJ and corruption is a way of life