The entire thread is about buying and selling NFTs, so I think it’s fair to infer that we’re all talking about the merits of NFTs having a non-zero price.
Yes, and their point was in the context of a thread debating the merits of NFTs having non-zero price. The comment was claiming that the supposed "genuine scarcity" justifies the buying and selling of those physical goods.
The claim was that they would rather not buy anything that is being made scarce artificially, which is a perfectly reasonable position. You don't have to agree with this principle. But, again, this is bears no relationship to the question of why a t-shirt is worth $10 and another t-shirt is worth $5.