Several reasons.

First of all, a lot of people argue in bad faith online and it’s not worth my time and effort to feed trolls, sealions and shills.

Second, the question without further context implies that only people who know exactly what to replace it with are allowed to advocate the end of a horrendously wrong system.

Second and a halfth, why are you talking me with being more specific when the question was far too vague to even know if that’s what they were asking for? Why demand specificity from me and not them?

Third, in this specific case I’m tired and thus have less energy left to spend on what might be another futile back and forth. If they’re not serious about discussing it in good faith, I’d much rather spend my remaining energy on something fun like Baldurs Gate 3 or something…