Most people who consider it more convenient eating unhealthy foods than healthy, home-cooked ones, might consider it convenient now but will pay a stiff price in the long run, when all the health problems emerge.

We are unfortunately not built this way. We don't look into the future and we are terrible at predicting how we will feel. I think it is because evolutionarily, we didn't have to and we couldn't store food or have it available. The last few thousand years and especially the last 100, this has changed. Now we are fat and sick on average.