The ability to run without a fan is not a problem; it's a feature. Would you want a fan in your phone?

When he said games did you assume he meant Solitaire?

It's also a con. You get worse sustained performance. You also get a hotter device. There's a reason the base model M series MBPs consistently bench higher than the exact same chip MBAs in things like Cinebench. The fan.

It's fine, but it's a design decision with tradeoffs, and gamers are prepared to make different tradeoffs (bigger and noisier are ok if they deliver a big enough performance jump).