I fully agree with you that you are there to accomplish certain lessons. One of my major goals is that they emerge with a positive water attitude. That way there is no need for a "mending of attitude that may be needed as a result to be addressed subsequently"
The time you would spend remediating a bad water attitude is better spent doing things such as tune up drills & teaching actual blinds. Furthermore a good positive water attitude from the start bodes well for long term advancement IMO