Yes, food spoils. We buy a bit more than we need and throw some out. We don't eat everything on our plate. 30-40% of food is wasted, this is true, but it has always been this way throughout human history.

This argument does not change the fact that food production is going up.

Look at that chart in this way, each person is getting more calories. And there are more than twice as many mouths to feed now than at the start of that chart in 1961. So twice as many people are getting more calories per day. That is like a 300% growth in food production since 1961. That averages out to around 5% growth per year.

Scarcity is not artificial. It is a fact of our reality. This will remain true because of physics. You will use more energy to create something than needed. Some energy will always be lost to heat, friction, and inefficiencies in production.