Because there's different motivations for being vegetarian. Some do it, because they simply find meat disgusting, in which case, yes, they probably don't want t

Because there's different motivations for being vegetarian. Some do it, because they simply find meat disgusting, in which case, yes, they probably don't want their food to look, taste or feel like meat. But others do it for moral reasons, and to them, meat might be the tastiest food in the world, they just choose to abstain from it, because well, you know, animals have to die for it. So, if they can eat something which tastes like meat, but doesn't require animals to die for it, that's the best of both worlds to them.