Because they want a pink camera? Sorry serious is there really an answer except they don’t have any idea. Added: As photoace says, 35mm film is a far better teacher, all the great shooters I know learnt on it. It’s easy to tell those learnt on digital they say things like exposure doesnt have to be perfect (they must think details lost at the highlight or shaddow end can be fixed in a computer) or underexpose 2 stops and fix it in the computer. It doesn’t take long for those with lack of foundations in the professional to reveal themselfs. Added2: Digital does little to teach people. If you mess up on it you just delete and try again. On film when you mess it up. there are tears and frustration and a person tends to learn not to do it again. I havent shoot film for 5 years but its still the best way to teach and learn. With digi learners they tend to take 100’s of shoots and hope for the best, those that have the frustration of learning on film are usually far better at getting the shoots they want all the time. If not serious about the art then digi is fine. A friend of mine only shoots film and they tend to get 20 usable shoots from 24 frames. I have picked up digi bad habits and my ratios have slipped.
Learning on film is not for everyone sure and some really don’t need to know much but how to select automatic, different strokes for different folks.