You may be correct with OpenSea and Ethereum. The art/NFT scene on Tezos seems different, with maybe 80% of people focused on the art itself and collecting for the sake of holding for personal enjoyment. The prices are much lower, in general, and gas fees largely nonexistent. This makes it easier for people without significant resources to participate. Check out objkt.com, hicetnunc.art, fxhash, etc - the vibe is almost completely different than the Ethereum marketplaces.