I think it's definitely becoming more of a thing in the UK, to expect your every preference to be catered to.
We have to provide meals for groups of people as part of my husband's job, and the groups are, broadly speaking, very different demographics. We have each of the groups around approximately once a month. The group which consists of over 65s, British people have zero dietary requests ever. I've never had anyone fill in that box at all when we send out the monthly invite to their group. The group of 20s-30s internationals (mixture of mainly Asian and Mainland European, plus a few Africans), have a few vegetarians each month, and an occasional dairy free. The group of 20s-30s British people put SO many things in the dietary requirements box that it is a real challenge cooking for them. No gluten, no dairy, no nuts, vegetarian, vegan, no mushrooms, no bananas, no rice, no spice, low carb, no dried fruits (!!), not keen on green veg... these are a few of the recent ones written on the invite forms. I have absolutely no problems catering for allergies and ethical/religious diets, but it's a bit of a nuisance trying to plan a meal around 15 people's personal likes and dislikes. They don't pay for the meal, and they aren't required to be at it, it's just a bonus if they want to join for it before a meeting.
It is interesting to me that this one group feel free to state their preferences when the other groups presumably also have likes/dislikes, but don't mention their preferences, only their requirements.