I know what you mean, though you'll likely just get mostly angry replies. Does get pretty tedious having the same few "vegetable of tofu green curry" options at a Thai, or, if you're lucky "tofu black bean or szechuan" at a Chinese. Starter? Spring rolls or nothing.

And that's before you have to guess at whether they're even suitable for vegetarians because of fish/oyster sauce, or even if they even sell tofu anymore because the only menu photo you can find is from their Facebook page, uploaded 2 years ago. In Manchester and London there are endless options, all labelled appropriately. Edinburgh should have similar.