This is exactly it.

It would be like if I made a website called "veggiebot" and the logo were a tomato, and everyone were getting up in arms about tomatoes technically being a fruit (berry).

Yes. In theory tomatoes are not vegetables. But in practice they are treated as vegetables and searching for images of "vegetables" in google will almost certainly yield pictures of tomatoes.

In theory ASCII is not Unicode. But in practice, 99% of people don't care about the under-the-hood esoteric intricacies of all the different character encodings. They see a picture made from printable characters instead of pixels and think "ASCII art"