Or did I simply misunderstand, and you're trying to say is Lightning "can be built" on top of other chains, not only Bitcoin?
That's what I meant, even though there is little to no reason to do it elsewhere.
Don't forget it's possible to perform atomic swaps on LN.
Or even worse, staggering the malware code across multiple blocks after encoding it in binary.
You could fit a lot of viruses or at least payloads into the blockchain like that.. It is quite damningly easy to pull off using Ordinals as long as you have a transaction parser that processes witness data and extracts it from the rest of the block.
All sorts of nasty and malicious things could be stored in the blockchain using this method. This is what the people spamming it with pepes, cypherpunks and dickbutts don't realize.
I think it's also already happen, which is why Bitcoin Core perform XOR obfuscation on it's files.