No shit. There is no comparison between retro consoles and current consoles which were, at release, powerful PCs jammed into tiny boxes. A console like the NES, SNES, Genesis, etc. have no moving parts to break and the heat generated is negligible.
To be fair, the NES did have a moving part in the cartridge loading tray, and it was that particular part that was the achillies heel of the console. Everyone had their own little ritual for getting cartridges to work when you hit the power button and was greeted with either a blank screen or alternating RGB screens.
And also to be fair, none of the consoles of that era really had the power needed to require anything other than passive cooling. I had a 486DX-2 50MHz CPU system which was passively cooled as well. Doesn't meant that the 486 was somehow a better designed CPU to an Ivy Bridge Core i7.