To me, TCGs are defensible because they are Games in which you are knowingly consenting to a system in which collection is a part of the experience. The manufacturers give a standard MSRP for cards during their printing period. Aftermarket cards are priced based on the utility given within a game system and that feeds into a collectors valuation. This is, I think, an acceptable outlet for the humanistic urge to collect things. I do think its exploitative but at least the messaging is clear and fair.
I take issue with systems which exploit gambling urges for profit. NFT's claim to be the future of DRM for independent artists, but they are exploited into becoming pump-and-dump schemes and wildly speculative markets. They use language used to defend artistic IP but ultimately function as a game with arbitrary rules.