I don't get what everyone is saying. You say Answa did not heal after he said he did heal even though he didn't want to. If you read the flame, it's not about whether or not summoners can main heal or not. It's obvious that they can. Nor is it an argument about whether or not summoners should main heal. It's about the fact that he was annoyed that he wasn't asked about it before he was invited when his search comment said he wouldn't. It's about the dumbass party leader. This guy (nameless) is getting flamed because he can't read. He can't see that the smn he invited doesn't want to main heal. He can't read when the tank says "afk". He can't read when the healer says "afk". And people got killed because of the leaders stupidity. That's what the flame was about.
I feel you're allowed to play any job any way you want if (and only if) you find 5 other people willing to accept that. If you can wait for 8 hours to find a party that doesn't ask you to main heal as smn, you don't have to main heal. Plain and simple. If you want to wait around for a party that likes blm/smn, you can play blm/smn. If you can wait for a party to take you in as a bst, you can party with bst. But people usually don't like waiting around for days finding a party, so they accept what their job is expected to do and they do it.
I feel you're allowed to play any job any way you want if (and only if) you find 5 other people willing to accept that. If you can wait for 8 hours to find a party that doesn't ask you to main heal as smn, you don't have to main heal. Plain and simple. If you want to wait around for a party that likes blm/smn, you can play blm/smn. If you can wait for a party to take you in as a bst, you can party with bst. But people usually don't like waiting around for days finding a party, so they accept what their job is expected to do and they do it.