[DannyBee]

Actually, most require both parties agree on the arbitrator.

In fact, everything in this comment is wrong. You should go read JAMS or AAA rules (which have existed and been reasonable well before any of the current irrational hate for anything but court)

Court is not expensive on purpose. It's expensive because super long, involved, processes that involve tons of formal interviews, depositions, document production, and document review, is just not cheap to run or do.

It's also unnecessary to reasonable outcomes the vast majority of the time, which is why ADR methods exist.