When burgers come from plants, 100% of the farmed acreage is directly used. If those plants are used to feed a mammal which are then turned into burgers, 10 times the acreage is required for that same burger.
As the demand for fake meat increases, so does the acreage under cultivation. So, you propose further destruction of the environment, and the subsequent damage to other species that rely on that habitat, in order to feel better about your culinary choices. How do you justify wholesale destruction of another creature's livelihood just so you can claim the "higher" moral ground? Besides, if you want to eat vegetables, why not just eat the damned things. Why all the fakery.