Gore-tex doesn't break down or wear out, but the DWR does. Reapplying DWR will help shed the outside water but won't stop leaks in areas that are worn through. Products like in the video above also work similarly.
"Technically, a Gore-Tex membrane will not break down or become less waterproof over time. However, because Gore-Tex is typically bonded to another, or sandwiched between two layers, it is those fabrics that can lose waterproofness. The outer layer of Gore-Tex may stop beading off the water and start absorbing it instead."
https://www.gearassistant.com/is-gore-tex-worth-it/
I use tech wash then tx direct from nikwax for my outerwear to good effect, and from day one used their nubuck treatment on my NLA Keen Durand boots (replaced by the Durand II, which were not as comfortable).