Mark Dickson wrote:
Yes, pre-landing checks are carried out; they include
checking the gear is down. If you do the checks your
gear shouldn't be up on approach. If you don't do
the checks you wouldn't have checked either gear or
airbrakes and you'll be distracted on approach by the
buzzer. You don't need a buzzer; just carry out your
checks.

Spoiler checks are easy to get right, and become pretty automatic for
most. Landing gear is not so simple for those fly multiple gliders,
some with fixed landing gear, some with gear handles that move the
"wrong" way, etc. Plus, for those of us who land at asphalt, dirt, or
gravels strips, a gear up landing is a US$1000 or so mistake. I'll keep
my gear warning, thanks. I've only heard one once in anger, and it was
well worth the momentary distraction...