How so? The page you link offers three definitions[1], and all of them require an infinite tape.
You could argue that a stack is missing in my simplified model of the human brain, which would be correct. I used the simple model in allusion to the Chinese room thought experiment which doesn't require anything more than a dictionary.
Turing completeness applies to models of computation, not hardware. Otherwise, nothing would be Turing-complete because infinite memory doesn't exist in the real world. Just read the first sentence of what you linked to:
In computability theory, several closely related terms are used to describe the computational power of a computational system (such as an abstract machine or programming language)
You could argue that a stack is missing in my simplified model of the human brain, which would be correct. I used the simple model in allusion to the Chinese room thought experiment which doesn't require anything more than a dictionary.
[1]: https://en.wikipedia.org/wiki/Turing_completeness#Formal_def...