T'Pau apparently seemed pretty okay about it considering she greased the wheels which let Kirk off the hook for violating orders to come to Vulcan. Honor and tradition were satisfied and she learned that Human friends were awesome to have. The outcome of the challenge would be no different had Kirk actually died and since he didn't, an upstanding Vulcan guy named Spock avoided going to the pokey.
Win-win. I'm sure T'Pau had a lot of crap covered up on her watch. This solution avoided repercussions that would have opened up their secret traditions to lot of people who wouldn't get it.