Like @papagene, I too try to relate my enjoyment of the process. People like having fun, and are jealous of other people having fun when they are not.

I've found it's a bit like talking about cooking: the process may be daunting to most people, most people understand the tastiness of the results. Yet there is always someone who will never understand why you don't just use the cheapest prepackaged mixes; it's impossible to convert those folks, so don't try.

And I've had more than one digital photographer admit that they want to try shooting film. I'm happy to go out shooting with them and lend 'em a film camera for the day.