How does everyone still not get this? Here, let me break it down for you.
Look at amiibo. First group of amiibo come out, Nintendo has it's initial shipment. It underestimates demand, and people get pissed. Bad.
So, Nintendo decides to try to fix the issue with Animal Crossing amiibo. Well, Nintendo overestimates demand. They litter store shelves for months and can't be sold for even $5 or less. This is WORSE. Stores get annoyed they are stuck with extra merchandise they can't sell. This costs Nintendo a lot of money and relationships.
Fast forward to NES classic. Does Nintendo over produce it and risk a repeat, or under produce it and if demand is high, do a second shipment? The answer is pretty clear. Watching people think it's some sort of manipulative scheme is hilarious...It's cost. Nothing else. If you over produce and misread it, you're left with a lot of leftover supply.
I've seen it time and time again with more products I can't mention. But that's how it works.