The operative word being can... I'm going to hazard a guess that most people buy commercially prepared, high sugar cheesecake.

(I think the simplest way to stay healthy is to insist on cooking everything you eat from scratch or almost-scratch. You'll start eating mostly fruits, veggies, nuts, meat, rice and legumes out of sheer laziness. Grounding up wheat into flour and baking cakes? Ain't nobody got time for that! The main danger is the possibility of skipping meals for laziness or procrastinating until you get into the "too hungry to cook" stage and are forced to order out.)