The problem with this "gear warning" is that you see it all the time - so you totally get used to it .
Fortunately there is also the gear warning horn (also implemented correctly) that will sound when you misconfigure for landing (silenceable/not silenceable) and of course finally the GPWS warning "too low - gear".
So for a mentally healthy and composed pilot it is virtually impossible to land with the gear up - there are some skillsets that do allow this, though.
PIA = Please Inform Allah
https://www.flightglobal.com/safety/pia-a320-crew-lowered-then-raised-undercarriage-before-gear-up-touchdown/138979.article
https://www.bbc.com/news/world-asia-53182750