Sidechain and other L2 already exist far before Ordinals created. But almost no one use it despite both Liquid network and Rootstock have smart contract capability and developer behind it promote it support NFT/token. I also have seen Ordinals supporters say they only want to use Ordinals since their arbitrary data guaranteed to be immutable.
I think I adequately explained why the NFT bullshit doesn't use alternatives (I mean forget sidechains, they could just spin up another blockchain or use bcash or whatever). If it wasn't clear you can ask questions.
Of course, there is also always the potential for collateral motivations but if you pick through them the most likely sound like ones trying to divide up the Bitcoin community, or trying to prove out points of control or that transaction censorship works. ... but you don't need alternative motivations to explain the shitcoining, it's just that even when one is sufficient others can be true too.
and, yet again, nft shitcoining stuff is mostly orthogonal to opreturn. If it wanted to use outputs it would just be using fake outputs.
I've seen your post and it's clear enough. I was just mentioning justification of Ordinals supporter (which IMO is ridiculous) and the fact Sidechain/L2 isn't popular option for NFT/token (and in general).
I guess if the Ordinals wave would have begun, and Core "patched" it let's say in March or April 2023, then the Ordinals folks would have massively switched to Stampchain (which was already around in early to mid 2023) for NFTs and existing protocols like Counterparty (not a harmful method, but could have created a similar spam wave) for tokens -- take into account that the big majority of the "spam wave" was due to BRC-20 tokens which doen't need the "extended Taproot witness size" to work. Stampchain later even created a token protocol (SRC-20), and we can really happy that that one never really took off, it would have caused even more stress to the UTXO set.
I was about to say OmniLayer also exist, but it's class A&B TX are considered more harmful and almost no one use it back in 2023.