I must say I am really wondering what the big deal. First of all, those are not "mom jeans" mainly because in order to qualify as such they would need to be women's jeans. Specifically ugly, high-waisted, unflattering, women's jeans. These are just basic, boring and somewhat ugly men's jeans.
Obama defended his jeans by saying that they were "comfortable" which we can all understand. Especially when you consider that not only does he quite literally have one of the most stressful jobs in the world, but its a job that requires he wear a suit about 29 days a month. However, it is no more or less easy to buy flattering comfortable jeans than it is to by "mom jeans". Sometimes we want or need to look our best so comfort takes a back seat. But when you are shopping for comfort you don't have to neglect style. The important thing is at the point of purchase to take into consideration everything you want out of your jeans, you don't have to sacrifice comfort for style you just may need to shop around a little more.
besides, think of the alternative: