Part of what seperates us from animals is the ability to learn. We lrean that sometimes things that were accepted in the past are bad for us so we have to change our ways. Lead paint was fine in the past why not use it now, smoking was accepted in the past so why no do it now? There are many more examples like that.
Its ok though, I have to keep making the same point to my parents and my in laws. Both insist that you put infants to sleep on their stomach despite all the evidience showing thats the least safe way to do it and everything now quotes the "back to sleep" to remind you to place them on their back. They seem to forget that the infant death rate was much higher in the 60's and 70's and that things like switching from tummies to backs to sleep was something we learned since then.
If we all followed the "If it was good enough for our ancestors, it should be good enough for us" then forums like this wouldn't exist since there would be no need for new gear or techniques to learn about.