I don't understand why people build decks on ground level if they can have
a
patio that does not require the maintenance that a deck entails, does not
make for places where rodents can hide, etc. If you have a steep drop
off,
that would make some sense. If it is just to have a deck, it is silly,
IMO.

Some folks prefer a wood deck surface over concrete, tile, stone or other
masonry-type product. Why give them grief about it? That and, in many
cases, it's a helluva lot easier to install a deck than the effort to
install a concrete pad. Especially in areas with freezing temps.