I can't see how enjoying simulated dead flesh is morally any superior to enjoying real dead flesh. If the concept is so appalling, why enjoy a synthetic version of the concept?
As far as I'm concerned, it's all food with different textures and flavours. Just that an animal has to be killed for you to eat some of them, and not others. Actually I don't think there are many pleasant flavours or textures available from meat that aren't available from other sources...
I personally have no absolute moral objection to killing animals to eat, particularly if the necessary nutrition is not readily available elsewhere. In the society we live in that just isn't true and therefore I'm happier (and certainly not any less healthy AFAIK) not having animals killed for my enjoyment. I could just as easily say that, for example, minced cow flesh has a very similar texture to bulgar wheat prepared the way I like it (though without the lumps of fat,gristle and bone!), depends on your perspective!
Anyhoo, what about vegetable rights?
As vegetables are quite clearly not sentient beings they haven't got any in my book