I have many friends which are vegan and we live in an area + work in an industry with a comparatively high amount of people with such a diet. We have talked about the topic at lengths, and my understanding is that in order to have a healthy diet you have to do quite a bit of research and spend time planning your meals. And then going out on a dinner is often a pain, although this has improved in the recent years.

We eat much less meat than the general public. But going the next step and eliminating meat and then diary products is not trivial. Unless you have less responsibilities and or more prior knowledge to get you up to speed. I simply do not have the time for that, I have a small kid to take care of. And we often struggle to plan enough meals ahead of time in the short period of time between finishing work and doing groceries.

It might sound like an excuse to you. It feels the same on my end, when my concerns are dismissed with some hand waving by people which usually are in a completely different place in their life than me.