Because people view their products as necessities to everyday life. People want to eat meat and and (real) cheese no matter what.

If without subsidies it becomes cheaper to import these types of foods, it becomes a national security issue.

Plus without subsidies this stuff gets more expensive, so people will start complaining

Because if fuel/milk/meat doubled or tripled in price, and the average member of the developed world would riot, and the guys in charge like being in charge. To the terminally online people, you are not the average. Just because you have a diet that gurgles gonads, or don't have to drive a lot for your work, doesn't mean the rest also don't have to.

There are often talks of carbon taxing, but removing subsidies would seen to be the obvious first step. Subdiside greener options instead.

because its tradition!