Why 'vegans don't want to eat meat so why do they want to eat meat substitutes?' is illogical

People get irate when they see vegans/vegetarians eating meat substitutes, claiming it doesn't make sense when they won't eat proper meat.

But it does make sense: it's actually rather simple.

The reason they are vegan/vegetarian is that they don't want animals to be harmed.

Immitation meat doesn't harm animals in any way so why would be an issue? 

If meat is a problem because it harms animals, and immitation meat doesn't harm animals, then immitation meat isn't a problem.

If immitation meat isn't a problem, there's no reason for vegans/vegetarians to avoid it.

Also, hating meat production is a seperate issue from liking the taste/smell/texture of meat.

Meat substitutes allow the experience of eating meat without the negative consequences.

So complaining about vegans eating meat substitutes makes no sense.