What if the child is being taught good techniques and sportsmanship at practice but when tournaments come you are struggling to find someone to coach your kid? Other obligations prevent you from having a coach or you don't have enough within the club to cover the matches.
This problem is much better the being taught bad techniques & sportsmanship & having the coach there 5 matches prior to your wrestlers. IMO, mat coaching rarely wins matches whereas good practice during the week does.