Reading too much will be likely to make you think you need a lot of stuff that is definitely not necessary.
For me, it was just the opposite. The more I read, the more I saw how much trouble people had early in their tours with overloaded bikes and how much stuff they mailed home. So all that reading convinced me of several things: (1) Don't send stuff home--leave it home in the first place, (2) Take stuff you will actually need, not stuff you think you might need, (3) Do at least some riding close to home with exactly the same gear you will be touring with.
You have a point. My advice may be bad if it leads someone to not pare their list down. What I was trying to help avoid was reading other folks lists and saying, "that's a good idea, I'll add that and that and that..."