Savage/ultimate is an entirely different kind of beast compared to other content to be very fair. What I feel like Yoshi-P and the team is implying with the way they word things and design content is that you should NOT shame a healer in dungeons/low tier content for not doing DPS, neither should a healer have to design their build with DPS in mind or become so narrow sighted at DPS that the healing is suffering. However, if a healer can, they should throw in some DPS, especially at high end content.
So in other words, be a reasonable person.