Unnecessary modules take up memory. That doesn't matter much on a system with 16GB RAM, but it does for an embedded device.
The vulnerability discussed in the article proves modules that aren't needed are best left out - otherwise the vulnerability would be present and active in every Linux machine in the world.
Modules can be loaded on demand, for instance when a "file" in /dev is read. These files are accessible to anyone - even if you don't have permission to read them, just attempting to do so can load the module. With so many vulnerabilities coming our way this is a brilliant and easy fix.
I hope he gets a shout-out at the next FOSDEM, which is held in Brussels. Judging by his name he won't live far away.