Different reasons
Some people go veg'n without really wanting to give up meat. It's solely a decision based on ethics. They want to replace the animal products with plant offerings as close as possible
Others don't miss me at, and don't really want to replicate animals, but do want different textures and like the same seasonings that are traditional in meat based products.
Sausage, bacon, ham.... those don't taste like meat, they taste like seasonings and smoke.
I make seitan, and balked at calling it 'chicken', for the one with typical poultry seasonings. Or 'beef', using the deeper beef seasoning. I tried calling them 'white' or 'dark' seitan, and what response did I get after explaining them to people? "OH, so it's like chicken (or beef)!!!!
There was a low fat trend years back when turkey was used for ham, bacon, burgers. So many people didn't like that, saying it wasn't XXXXX if not made with the traditional meat. Look at today---they're still there, and accepted. Some day plant foods will be also be accepted as the base.
I will say I hate when things that are so clearly plant based get called be meat names. Like 'toona, or chik'n, salad . It's chickpeas.
This always brings to mind a date I was on where the guy said he'd bring chicken to a picnic, and I'd bring sides. I expected a bucket of fried, he brought boiled chicken parts. Literally, just boiled, chicken pieces! I have never in my life wanted to replicate just meat
Oh yeah, the daikon medallions. I find I always need to explain my foods. Like I'd call them sauteed daikon, but people looking at it would recognize a meaty thing, so saying daikon steaks may work better