This is true, but a bad attitude does come out in the
presentation of that thought. Comments like "Apparently this
is too obvious to bother writing anywhere" when complaining
about a lack of documentation aren't productive--if taken at
face value, this particular example is just
self-deprecating. If the sarcasm that (I think) is
underlying it is also taken into consideration, it takes on
a dimension of rudeness thinly masked by self-deprecation.
Either way, just asking for help rather than sniping at
yourself and/or the documentation folks is more helpful and
probably takes less time to write, as well.
Amy