"Newps" wrote in message
news:6wM_b.396854$na.764749@attbi_s04...
What, you wouldn't? Why should I wait for someone to clear the runway
if there is enough room for me to land behind him?

The same reason you take more fuel than the bare minimum, that you clear
obstacles by more than the bare minimum, and start your takeoff roll with
more than the bare minimum of required runway remaining.

It's hard enough to ensure that you will not make any mistakes while
landing, but you don't have any idea what sort of mechanical problems might
occur, such as brake failure. Or, you might have to make a go around at the
last minute that puts the other aircraft right in your way. There's all
sorts of reasons the landing might not go exactly as you expect it to. Why
reduce or eliminate your safety margin when there's absolutely no good
reason to?

The day you attempt to land while someone is still on the runway, and you
find that you can't avoid running into them, you'll understand why you
should wait.

Pete