That's just very not true...
[1] Theoretically it might be able to do anything, but the context is clearly talking about what is, not what could be.
A Turing machine is a mathematical model of a computer, it’s not a real computer.
Real computers can do things that Turing machines can’t do, e.g. generating random numbers[0], interfacing with hardware, etc.
[0] https://en.wikipedia.org/wiki/RDRAND