I'd say you're more lazy than busy. I eat out a lot, but I typically go to restaurants that have healthy options. I can afford it... but that'd money be better spent elsewhere (like on content or links). I can admit to myself that it is purely because I don't want to go through the motions of cooking.
Preparing a healthy meal doesn't have to take more than 30-45 minutes (including clean up). Think about all the other things you waste your time on (social media for example) that exceeds that 30-45 minute window. Replace that with cooking instead. It might take you just as long to go to the fast food restaurant and wait for your food, and then go home.
Use cooking healthy meals as an opportunity to integrate some of the other important things in your like. Turn on a podcast, catch up on some news, or call a loved one. You can do all of that while cutting up some veggies and flipping a piece of salmon on a pan.
There are also some hands free ways to cook after you prep. Like baking some chicken breasts and veggies for 30 minutes, or even throwing them in a crockpot/slow cooker. You can throw your food in the crock pot, go work your 8 hour day, and come back home with dinner ready. Cook up some extra and have healthy left overs throughout the week.
It is important to take care of your health, and you will be a better worker because if it. You will have more energy and generally feel better... and that will carry over to your work and social life.
The food we eat (even organic foods) are already lacking in nutrients because of the soil it is grown in. The soil has had the nutrients sucked out of it by mass production farming, and those nutrients are not replaced because there is no natural run off, decomposer, or wood ash that replaces those nutrients where it is grown. It is making your health worse to not get any good nutrition at all from that fast food, and your compounding that negative situation with all the other disgusting artificial additives, food coloring, and other chemicals in that fast food.