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.

When he said games did you assume he meant Solitaire?

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).