Like Dave ⬆️ I also grew up in a time where basic courtesy was the norm. It takes no effort to say thanks or give a driver a nod when they've stopped for you.
The way I look at it, every interaction I have with other people is a small opportunity to put a smile on their face or make their day just a little better.
Not acknowledging another's good deeds seems churlish when it costs nothing & makes both parties happier.
Also: the ute driver was out of order.