"- I'm not a pilot, but as a passenger, I've noticed that pilots from northern climates can sometimes have problems when landing at airports like Miami or Tampa where the air is often hot and very humid. This seems to increase the lift on the wings."
As a seaplane pilot, rest assured that heat and humidity decrease lift, not increase it.
The factors controlling a large jet are both complex and have response factors which make it very easy for the pilot to get behind the time line for decision making.
Even a slight error can cause difficulties when landing a few hundred thousand pounds of metal on a narrow strip of pavement at speeds double that of highway travel. That's Interstate speeds on a good day, and in open country.
Still and all, the pilot will doubtless hear about that one for a long time.