Have meat if you’re usually vegetarian

For the third or fourth time in a couple of days, through chance alone, I came across four websites espousing the benefits of “mixing things up” through changes in habits. All four recommended “having the vegetarian dish if you normally have meat”.

Why not the other way round? Why not have meat if you’re normally vegetarian? I’m pretty sure that would be a pretty “out of your comfort zone” moment.

Let me know what you think