You mentioned fencing: the electronic scoring system in fencing is pretty primitive, and has not at all replaced the need for a referee. It determines whether a hit has landed, and that’s about it. Unfortunately the sport still has a big problem with how subjective the refereeing is (particularly in sabre, which is my weapon), and that’s driving corruption at the highest levels [1].

https://www.nytimes.com/2024/05/09/world/europe/fencing-olym...