Different staff members have different ways of handling different stuff, as well as logic, some might think "How would we know you are using auto-click?, you can just have your mouse stuck, or be clicking yourself, so yeah" , others might think that watching somebody do the same thing for 5 hours means it is definetly auto-click so no, these are both good opinions, but it is hard to determine which one should be prioritized so the simple, "Is auto-click banneable?" isn't as simple to answer as you might think.
At least that is what I believe could cause some contradictions or disagreements.