Network sniffing is a very real threat, not just a horror story for network administrators. Maybe it's less of a problem for you, but that doesn't mean everybody else is in the same situation. So I'd be careful with such statements.
I don't think it helps people to make hyperbolic statements about sniffing, and raise the level of paranoia without a healthy understanding of exactly how and when your packets might be intercepted. Most people that hook up to their ISP will find that they can't sniff anyone's traffic.
Now if we're talking about a cloud server, or something like that, then I would agree that it's a much more likely scenario. I'd actually encourage people to try out some of the common sniffing packages, as they have great utility when debugging network applications.
Just to be clear, I'm not trying to say that people shouldn't implement TLS, or use VPN's or anything like that. But by the same token, they need to understand some networking basics and ideally, have explored the tools that facilitate the problem in the first place, so that they're clear under what circumstances they might be exposed.