Granted, the appeals are unlikely to succeed, but perhaps that is because arbitration typically has an approximately fair outcome? Appeals of typical court cases aren't likely to succeed either, but we don't say that court is therefore unfair.
Yes, I'm sure, because I read your link, which says that you can't appeal the facts of the case or the merits of the decision, you can only appeal the process, which, in its own words, provides "a high standard of deference to the arbitrator."
It may be your point, but it isn't the point under debate. We are talking about whether or not the courts provide a check/balance for the decisions of the arbitration system.
Granted, the appeals are unlikely to succeed, but perhaps that is because arbitration typically has an approximately fair outcome? Appeals of typical court cases aren't likely to succeed either, but we don't say that court is therefore unfair.