No idea why you seem to think meat is some how more easily prepared than vegan food. Both meat and vegan have easily prepared dishes and more time-intensive ones.
Entirely based upon instagram pictures of vegan food, which I am sure skew to the more visually interesting and intensive recipes. A lot of things seem like a lot of vegetables mixed together. I don't like to eat a lot of different things at once, I much prefer a single thing at once. I dislike the feeling of food in my mouth. For these reasons meal replacement shakes have been absolutely wonderful, without them I would constantly lose weight.