Slickback:
Okay, let me rephrase this. I already explained it correctly the first time but apparently you don't get it, so I'll try again:
Coaching is not inherently unfair. Having an event where coaching is encouraged would be a fair event, because everyone would be playing by the same rules. For this reason, the argument that coaching is unfair because some players have access to better coaches fails, and the analogy to teams works.
One can't say teams is unfair simply because one player has access to a better teammate than another. But people enter teams because they know what they are getting into, and they are aware that they are playing a two-player team, and that even a player on their level may have an extremely strong teammate due to friendship or regions or whatever.
This is totally fair because the idea is that you enter as a team.
Similarly, coaching in an abstract is totally fair as long as it is in an environment where everyone is aware that they should bring a coach. There will still be people who have friends who are better coaches than others, and those people will be at an accepted and fair advantage, because in this situation, you are entering as a player-coach team (entering the set, at least; depending on how the tournament is organized, you could theoretically have different coaches for each set. again, this is fair assuming everyone is on the same page).
Because these situations are relatively parallel, the argument "coaching isn't fair because some people are friends with better coaches" fails for the same reason that "teams isn't fair because some people have access to better friends" fails; thereby, either coaching is fair or teams aren't in their respective environments.
And to address the idea that I stated something that was not my opinion: I did no such thing. i stand by the idea that coaching is totally fair on its own, but should be banned from singles tournaments. I think if a TO wants to have a coaching-encouraged tournament, that tournament would be completely fair and would accurately represent the abilities of its player-coach entrant pairs (or, again, given more fluid coaching rules, players' ability to be coached by a variety of people and said coaches' group skill); the victor would be the player who, along with his coach, prevailed against other coached players.
However, the current tournament environment is such that many or most entrants into a given tournament are not in favour of coaching and have no intent to be coached. They are entering into a tournament where they expect to also play against an uncoached opponent. Then it isn't fair to them if some of their opponents are being coached, because they are trying to play one on one.
If people - as forward intends to - hosted "Coaching Encouraged" tournaments, then people would show up knowing what they were in for. No one would enter doubles without a teammate (except Chu at his biweeklies, I guesss) and expect to win because that's a 2 on 2 environment. Similarly, if you show up for a coaching tournament without anyone to coach you, you would be well aware that you are putting yourself at a significant disadvantage, and do so at your own risk.
tl;dr: coaching isn't wrong, but any given tournament should be explicitly either coaching allowed or coaching disallowed so people are entering what they think they are. either format is fine, but different, and the results may well be different given the same pool of entrants into each.