Listing the specific problem that led to a service denial could be helpful, but could be not. I bet that it's very rarely something like "You did <this one forbidden thing>, so we ban you according to the rule 3.6.4.2 of ToS". It could be something like: "The pattern of your activity is very similar to patterns of activity of 9823 known scam attacks". Or even more detailed: "8 out of 11 statistical models analyzing 982 parameters of your activity during last 48 days showed the probability of your account being used for illicit fund transfers above 0.92, and the remaining 3, above 0.57. In particular, our 100M-paremeter AI model (link to a PDF with technical details) has classified your activity thusly: (a 20-row table follows). According to the law, we use a publicly available model, widely accepted as a standard in the industry. You can inspect the model's weights at huggingface (link follows)".

Interpreting such results is a job. Disputing such results in a court, or with an arbiter, would be really hard, unless you're a practitioner of the pattern-recognition craft yourself.