He's probably talking about themself and a few close individuals, likely also from the tech scene.

Remote work has made it easier than ever for many people to cook at home. Before the pandemic, meal prepping was a pretty convenient way to do it. A couple of hours a week can get you very far.

Tech people are the people who are are working from home, and are most able to cook.

Barbazoo seems to me to be talking about the opposite of the tech scene, the 90% of people who don't have (or want to waste) an hour after work to cook dinner. Or even worse, take a half an hour away from sleeping every day to have time to cook breakfast, all for dubious benefit.

Will processed, quick foods hurt you more than sleeping an hour and a half less a day?

If 90% of people are not cooking, it is by choice, not because they would have to steal time from sleeping. Modern marketing is very good at convincing people to do other things with their time than what is good for them.

Some small subset might have to make hard choices about sleep versus cooking. Not 90%. Most are choosing something else over cooking.

Right, if the average American spends more than a few hrs/day watching the tube, as commonly reported, they could easily spare 30 minutes/day to cook if they wanted.

If it takes you an hour to prep dinner, you are either doing it for pleasure, for a crowd, or Wrong.