RE: "…blocking a bot is not remotely equivalent to discriminating against a person."
Just you wait.
The day someone, in good faith or otherwise, makes the case that they rely for web-browsing on the AI equivalent of a 'service animal'—which you have blocked—don't be surprised if some kind of discrimination case comes your way.
Not too far from this topic, law firm Pinsent Masons comments on Maguire v SOCOG:
"Although there is no case law in the UK related to this matter [website accessibility], the W3C guidelines have been adopted as the benchmark test in Australia, following the case of Maguire v SOCOG (2000). The case was brought by Bruce Maguire, who is blind, against the Sydney Organising Committee for the Olympic Games, known as SOCOG. Maguire argued that the SOCOG website breached Australia's Disability Discrimination Act because it was inaccessible to him when using a refreshable Braille display and web browser."
[www.pinsentmasons.com/out-law/guides/disabled-access-to-websites-under-uk-law]