Did hockey goalies always wear helmets?

If you mean helmets, as in American football helmets, the answer is no. This is because they would simply be too heavy! American footballers can wear them because the game is stop/start and one player doesnt play a full game because they have attacking/defending teams. If you mean a scrum-cap, then yes Rugby players probably should, if they play in the scrum, it will stop their ears from becoming deformed, but many players outside of the scrum wear them too.