Because everytime, we could just fly overhead and if we could “see the runway”, we could maneuver the airplane and land. It just doesn’t make sense to me.
Only if the wx vs. minima permitted it and it was allowed by charts/ATC/operator, etc. Also, you’d have to maintain whatever reference was required, which if the conditions were poor might not happen. It would also reduce the flow rate while you were enjoying yourself in the circuit...
P.S. That’s effectively what you do with a “breakcloud” procedure.
P.P.S. I’m not saying it’s a good idea in all circumstances but that wasn’t the original question?