When you fight back, fight from a position of strength. The bible is not your strong suit. So don't go there.
For any scripture there is another to match it.
https://www.biblegateway.com/passage/?search=Acts%2017:16-34
In this section of Acts, Paul says that God speaks to all people at all times through his creation. No preaching required. Of course, Paul is preaching in this instance....
As for people marrying, eating, and drinking, ask your elder friend if he has given up these things? No? The bible verse is not saying those things were bad, just that people are out and about doing ordinary things when disaster strikes. It is not an admonition to give up doing ordinary things!
A verse Blondie has mentioned often is Matthew 24:36. No-one knows the hour. So why fuss about it? The Witnesses obviously don't have the inside track.