I suppose there is a question here somewhere, but I can't quite find
it.

In any event, there is nothing anywhere that says that the max
resolution is necessarily the best resolution. For one thing, 1600x1200
may be too small for many monitors, depending on their size. For
another, an LCD monitor has a so called "native resolution", which is
the one that provides the best sharpness on that particular monitor.
You should find out the native resolution for your monitor and use
that.

The advantage of using higher resolution is that it may result in
increased PERCEIVED sharpness, due to the small pixels. This does not
always translate to better overall viewing under all circumstances.

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We judge others by our own limitations.