Funerals include pagan customs, too, based on erroneous ideas about the afterlife. Scripture says nothing about embalming, cremating, caskets, putting flowers on graves, etc. Pagans created statues of animals and people, both life-size and miniatures. They had statues in their flower gardens and statues in their homes. Money has pagan designs on it.
Dollar bills have an eye over a pyramid.
Pagans assigned days of the week to different gods, and we still use these names. The answer is, different Christians draw the line in different places. We need to allow some diversity on these issues, especially when we remember our historical tendency to judge people about paisley neckties, medicine, makeup, birthdays, skirt lengths, etc. Of course, we are not the only ones who made mistakes like that. Some conservative churches used to forbid wedding rings.