https://www.theregister.com/2007/10/22/drinking_made_it_all_...
Today we know some people have gut bacteria that make alcohol from sugar so will fail an alcohol breath test if stopped by the police.
Other factors include health of the liver and kidneys and other dietary factors, so in practice, its still all made up in my opinion.
The drink drive culture in the UK was very engrained.
Politicians driving to or from UK parliament on parliamentary business (having to vote) were exempt from the earlier drink drive laws until one of them killed or injured someone. Cant find the link for this anywhere now, so probably been silently cleaned up from the internet.
Like another poster said, what a nonsensical argument. You are a walking example why immortality for humanity would be a terrible thing. It is better that old people with archaic beliefs like you die off so that you won't be around to inflict your ridiculous nostalgia 'for the good old times' on the rest of us.