I cook too most nights, I love to see the kids tucking into a healthy meal with vegetables.
I went to catering college so I do know about food, I think most people who use convenience foods maybe just wouldn't know where to start in the kitchen.
I try to make extras each night and freeze a portion for my hubby to take to work at the weekend, but sometimes if there isn't any left I'll get him a ready meal. They are very expensive and no wonder they're so low in calories - you get a tiny portion (compared to my portions anyway)
I buy a large chicken and easily get 3 generous meals out of it, very economical and delicious - but I suppose if you didn't know how to joint it or how long to cook for etc it wouldn't be that straight forward.
They don't seem to do home economics at school now like we did though, I left school able to cook allsorts, a full meal and the basics, my daughter is 13 and all she's made so far is biscuits.