I think to most people, the fact that a comment is a statement of a person's opinion is part of the face value.
However, I've never interpreted our community to be like that. On this forum I don't expect to hear
The discrepancy between how much jail time the people who upset the government get, and the people who commit real crimes is getting bigger
without evidence any more than I expect to hear
database server X is becoming faster than database server Y
without evidence.