I think people forget something about the Peacock deal.
When WWE moved the Network to a major Streaming service in 2021, the only one that had proven LIVE capabilities was Peacock. Amazon was yet to do any Live broadcasts (Thusday Night Football didn't start until later that year), Netflix has just recently started dipping their toes into live in 2023, Max (then HBO Max) and Disney+ had no live programming, and Paramount+ didn't exist. The only option was ESPN+ or Peacock. I don't think ESPN+ was ever truly a viable option, especially since WWE had no prior relationship with Disney (the parent company of ESPN), where they had one with NBC/Universal (the parent company of USA/Peacock).
WWE will be the flagbearer for Netflix's Live programming which is a big deal.