Well, I don't want to have to dry the sparkplugs after a big wipeout...
Obviously, the problem of all these crafts are the noise and the smell. The only time I found JetSkis were bearable was during a good overhead day at Hossegor, the noise of the crashing waves was so loud that it covered the noise of a very good jetski rider that was surfing the waves with us.
US$12,500 makes it an expensive toy.