Your DS may be on the right track. We joke around that foods are "nuked" in the microwave. But, we really don't know if the radiation used to heat the foods are dangerous or not. Just because we
currently lack the machinery to
detect how low the levels or radiation are and the residual effects, doesn't mean that they aren't there.
Science is really in it's
infancy. What we call "scientific fact" is only as good as our powers of observation & repeatable study, and those are based on our
current level of technology, machinery and
available means of detection. What is scientific or medical "fact" today becomes obsolete, inaccurate data tomorrow as more advanced technology, machinery, research and the ability to detect at a new level invalidates the "fact." And that new "fact" is only as good as the current new machinery... which may get debunked the day after tomorrow.
A machine may be developed tomorrow that finds microwaved foods really not healthy. That it may contribute to the various health problems which are on the rise, that weren't here at the levels they are compared to a few decades ago.
Meanwhile, heating foods the "normal" way with direct heat, has been used since the first caveman diiscovered fire. And mankind has grown since then.
I like to use my microwave sparingly and consider whatever I cook in there may now be of the nutritional value of junk food. Filling, but may not be healthy.
So, yes, I do use my toaster oven as much as possible. I have a tiny kitchenette that doesn't even have an oven. So all my baked & broiled foods (meat & fish) are done in the toaster oven.
Walmart is fine to get one from. Make sure you get one with an electronic sensor, so the top & bottom coils heat evenly, and get a TIMER on the toaster oven. It's great because you can't forget about the something cooking and overcook it. You set it for a certain amount of minutes and it shuts off automatically.
I've had old models without the timer and and accidentally almost set the kitchen on fire because I forgot I had something baking.
Convection ovens are nice because they heat faster, but they've been reported to not broil as well or toast as quickly.
Check
Amazon for reviews of different toaster ovens.