I don't think there is anything wrong with parroting correct information even if you do not have hands on experience with that particular type of tortoise. How many times a day or a week is the same exact question asked? And therefore how many times is the exact same information given out? I'm talking basic care questions here. Sometimes number matter how often a person is referred to or actually given the link to a thread they somehow don't bother to read it. And if it wasn't for people who are patient enough to repeatedly answer these questions, even if they are just repeating information they have gotten here, then the information would not get to these people.
I think you have a point here too. If someone has read responses that say sand is a bad substrate 500 times, I see no reason why they can't tell a new person sand is not a good substrate.
This really is a case-by-case issue.