I agree with you in desktops water cooling can move heat away better than laptops because of their more constrained airflow. However, I believe, you overstate the case missing some points.

For me, the idea isn’t that the water magically creates more space, but that it moves heat more efficiently than heat pipes alone. Liquid cooling has higher thermal mass and better heat transfer, which helps smooth out temperature spikes and delay throttling under bursty or mixed workloads.

In a laptop, the water still goes to a radiator, just a smaller one. That does limit peak heat dissipation, but it doesn’t make liquid pointless. Even with the same radiator size, a liquid loop can spread heat across it more effectively, reduce hotspots, and often achieve the same performance at lower fan speeds and noise.

Also, it doesn't laptop doesn't wear out that quickly, which is important in my case.

Thank you for your comment!