Yes but how does veganism = 'disordered'?Disordered eating is disordered eating, this can happen to anyone across the dietary spectrum.
Excessive is 'too much' by definition so that's not really saying anything.It's not healthy to have to spend an excessive amount of your day thinking about your next meal and planning your time around what you'll be eating.
And 'not healthy to have to'? Some people might 'have to' spend time thinking about what they eat (serious allergy sufferers, diabetics etc.), some people might 'choose to'. Vegans don't really 'have to' spend that much more time thinking about what they eat. Is thinking a bit about what you eat a bad thing?
Who decides what is 'excessive', what is 'unhealthy'? What is the standard? How much time people spend on food is largely culturally determined and/or to do with circumstances I would say.
Is it 'not healthy' for people who have to farm / forage for long hours for their food to do so?
Is it 'not healthy' for Mediterranean family meals to go on for days?
Is it 'not healthy' for gourmands to spend a good deal of time planning and thinking about food? Would that be a fetish or a mental disorder?
But really I think this is beside the point as it's not that difficult to maintain a vegan diet. Any extra effort involved (over what? and as if a little effort were a bad thing...) has in the first place to do with self education and a little discipline, and then to do with the circumstances of living in a society that doesn't always directly cater for that kind of diet. Once you know what you're doing and fairly organised it shouldn't be a big deal.
It doesn't cost a ton of money to eat a vegan diet in a developed country if you can be a bit organised with buying ingredients and cooking. As long as you have access to cooking facilities it's not that hard. I don't know what you or your schoolmates were doing but obviously your sample does not represent the total reality of how to realistically follow a vegan diet.Personally, I think veganism is only feasible, easy and therefore mentally supremely healthy for people who make a shit ton of money. I think this because I went to a school that was around 50% vegan, and guess what? I could never have afforded to do that, only the rich kids could have.
And the implication that only things that are 'easy' (or cheap) are 'mentally supremely healthy' is beyond daft.
Myself I think it's a bit extreme and unnecessary I wouldn't try and stick to a strictly vegan diet these days. It's also true that if you are going to eat vegan then you have to know what you are doing to an extent and be careful to eat the right mix of stuff. But really that just goes for eating in general. And I have seen cases where veganism coincides with eating disorders in people, it can be turned into a bit of a neurotic focus, but to suggest that being conscious and deliberate about what you eat is 'disordered' eating is really wrong.