The exact same can be said of clans that try to use 'tactics' that inevitably split the team.
There are several ways that teamplay tactics can go:
1) A clan does teamplay and the rest of the people play along
2) A clan does teamplay and the rest of the people ignore them so the clan advances in order to support the morons
3) A clan does teamplay and the rest of the people ignore them so the clan says "fuck it, we're here to work on teamplay" and so they do, even if all the morons run off and die without them
None of these really strike me as "wrong".
Very few "skilled player" ever do anything for the good of their team except by accident. They are always doing #3. Cav rides down enemy noobs then spends the rest of the match bumping their own team while trying to steal kills. Two-handed heroes break from the pack because they want to try to sneak up on archers and find some "duels" on the edges. Archers ignore everyone and just look for easy snipes.
Don't go trying to crap on teamplay for "splitting up the group" when I could log into any server right now and find the biggest of the big-name players off by themselves looking for easy kills and duels.
(Incidentally, your quote from Turbo is absolutely correct. Only very stupid or impatient cavalry can be killed by spears. The smart ones just ride around you and lance the first non-spear that's outside of your 8 foot radius spear range. If you want to counter cavalry outside of an 8 foot ring around yourself, get a ranged weapon, not a spear.)