Those are not port scans though. A port scan is when someone is systematically checking a large number of ports on a system to find which ones are open and possibly what is running on them. A random connection to a single port is not a port scan and not something pretending that other ports are open will help at all with. And open services are typically announced in some other way and don't require scanning all ports on the whole internet to find. Though you may get connections from people that get the address wrong, or have an old IP that has been reused or something - those are not scans though.

Really it seems like you’re advertising your lack of imagination in this context than a legitimate lack of possible uses for spoofing open ports.

I never said that. I have mentioned actual use cases for wanted this in other comments in this thread - namely slowing down attackers by making them do more work by not being able to do quick checks for open ports. My responses here though are about the postulation that you could gain extra information with an open port in eBPF vs just a closed one or simply a service running on that port. Thus I do not think that is the reason you would want this. Never said there are no reasons at all that you would want to pretend ports are open.