Games require a lot of GPU, a fast processor, and a lot of RAM. An SSD on top of that makes sure the loading screens are kept to a minimum. All these features are absent in a normal laptop.
In any laptop, there are two key aspects in increasing longevity: temperature management and durability.
The fine detail here is that it’s the CPU that’s responsible for the cooling system, not the GPU.
There are three important considerations when you go for a gaming machine: GPU, CPU, and RAM. What does a game truly need? More often than not, the answer is the GPU. But it differs from game to game.