All sorts of software can be used to “generate potentially harmful results”. Think about an algorithm for displaying content on social media sites, a search engine, a piece of malware on a computer. Do we ban books on how to make bombs? It’s such a broad point to make that it’s practically meaningless. The computers job is to read a set of instructions and execute them. It’s abstractly no different to a human writing instructions for another human, with the adage that the computer is a much faster processor than a human. You can quite literally run these ML models (a collection of statistically weighted averages) with pen and paper and a calculator (or even none!). Things will be maliciously used, that means we don’t ban sharp forks (at the determent of legitimate users), we ban those that intentionally misuse those tools.