From reading this thread, it sounds like you aren't actually being expected to play "the healer", but you're annoyed that the party composition lacks healing except you - i.e. annoyed everyone else ignored healing.
It also sounds like your group has some other problems!
I think this sort of stuff shows that its a great idea for either everyone to get together and discuss character creation before the game. Discuss what is allowed (in terms of races, etc), what would be useful for party composition, what backgrounds make sense for the characters all to be there together, etc. Failing that, just having the DM discuss individually with each player also is a good idea to nudge them in the right direction. Otherwise yeah, maybe you end up with everyone turning up to the game with a character they've conceived, and they totally don't fit together in either story or party composition. Maybe something to consider for the future. Maybe if you'd talked about it together, then some other players might have thought about getting some healing.
As to the barbarian dice rolls, there should just be a rule that everyone does their dice rolls together, at the end of the session or something - that's easy and I'm amazed it comes up as a problem in people's games!
It also sounds like your group has some other problems!
I roill my dice in fornt of the DM, the Barbarian does it between sessions to level up. Claims he rolled a 12,12,11 for hit points and has 15,18 and 19 for dex/con/str.
I was kind of figuring that but everyone just made PHB PCs.
Notr I do not mind being a heal bot but one of the arcane types needed to be a front liner or something like a light cleric with the healer feat. I was the only one who took aream based feat everyone else took moar damage type feats or at least make me better type feats.
I think this sort of stuff shows that its a great idea for either everyone to get together and discuss character creation before the game. Discuss what is allowed (in terms of races, etc), what would be useful for party composition, what backgrounds make sense for the characters all to be there together, etc. Failing that, just having the DM discuss individually with each player also is a good idea to nudge them in the right direction. Otherwise yeah, maybe you end up with everyone turning up to the game with a character they've conceived, and they totally don't fit together in either story or party composition. Maybe something to consider for the future. Maybe if you'd talked about it together, then some other players might have thought about getting some healing.
As to the barbarian dice rolls, there should just be a rule that everyone does their dice rolls together, at the end of the session or something - that's easy and I'm amazed it comes up as a problem in people's games!