Personally, I'm kinda sick of hearing about how everyone has to be healthy. Especially being in High School. (I swear they cram it down our throats. It's all anyone ever talks about.) Leave people alone and let them have a varaity of options.
And I guarentee you Disney will continue to carry unhealthy food. From my observation, when people go on vaction, they like to eat whatever they want (especially when in Disney, 'cause they figure they'll just walk it off), and I can just imagine the amount of complaints Disney would get if they chose to not serve fries.
If you're in high school, you might not be aware of this...or you might notice it more than most grownups. The reason there's more of an effort to promote healthy eating in schools is because just about every study made indicates that not only are there more fat kids than there used to be, but they're getting fatter, earlier, for lots of reasons. What's in our diets has changed. A lot of schools have given up on Physical Education Departments due to increased insurance liability. And what constitutes a "portion" has changed in definition over the years. Kids are consuming more sugar, not only in increased consumption of sweets, but increased consumption of soda (hell, I remember when Kool-Aid started to promote the fact that their beverage was a healthier option than soda because it had LESS sugar. Even water now has sugar in it). There's a rise in Type 2 diabetes nationwide, especially among kids, and it all ties in to our diet. Fast-food restaurants, plentiful enough when I was a kid in the 70s and 80s, are now everywhere...
Trust me, I'm not trying to sound like an old fart (failing, but trying). It's just that the prevailing wisdom is now to try to train kids to eat healthier, and hopefully they'll develop better eating habits for the rest of their lives, better than the past few generations of overweight Americans. So that's why they're inundating you with it in high school. If you don't have a problem with it, awesome, more power to you. But I'll bet you have a lot of classmates who could bear hearing it a little more often.
As far as McDonald's leaving WDW, and WDW still offering burgers is concerned, when Mc'Ds becomes as well known for their salads & grilled chicken as they are for their burgers & fries, maybe WDW will revisit an arrangement. As it stands, WDW made a good chunk of money, up front, with allowing McD's access to their customers in exchange for all that Happy Meal cross-promotion for a relatively lackluster decade of tie-ins. But people now equate McDonald's with obesity and crap food the same way they equate Big Tobacco & lung cancer (for the record I don't know why DTD felt the need for a Sosa Cigar Store, but at least cigars have a reputation of being an occasional pleasure in comparison to cigarette smoking which tends to be more frequent). It might be an unfair knee-jerk reaction, but for the moment there's not as much of a upside for WDW to be associated with McD's, so why bother? Besides, if all the schools become successful in training their students to eat & live healthier, McD's won't have the sort of cache amongst young uns that it's had for a while, so even in the future, there might not be as much of a need for an arrangement between the 2 companies.