Actually all ear tips need replacing. I replaced my stock Apple silicone ear tips because it was getting yellow and worn out and also my numerous foam tips.
So, not sure where you got "doesn't need replacing" as they clearly made a comparison with socks: "eventually needs to be replaced." and "All ear tips, whether it is Apple's original silicone or foam DO NOT LAST FOREVER."
It's good that they try to set expectations with the sweat, oil, wax section.
I think they want to let people know these last longer than foam tips but does need replacing, not as frequently.
Regardless, it looks like a great ear tip solution and backed them as well.
If anyone who hasn't seen it yet:
AirFoams Pro Active 2.0 Ear Tips for AirPods Pro
Combining our previous Kickstarter's AirFoams Pro Memory Foam Tips with the durability and flexibility of Siliconewww.kickstarter.com
They look good to me. I have 6 sets of Comply tips for now... when they are worn out, I'll try Charjen's new tips next.