You're still not getting it lol. Neoclassical economics is theoretically standing out way over a cliff and simply refusing to look down like Wiley coyote. Your appeal to mathematics is unintentionally hilarious, because it was physics envy and the chasing of mathematical models over real life evidence/coherent theory that led the field astray to begin with lmao. You can come up with all kinds of fancy models and as much mathematics as you like, but none of it matters if you're basing it on incorrect axioms.

"Functioning in the real world" - oh yeah for sure. Burning the environment down and cooking the biosphere while forever chemicals and microplastics permanently saturate the ecosystem. Liberal societies are "Functioning" in so far as they're not actively failed states this very moment, but that is accomplished on the back of neo-imperialism, unequal exchange with the global south, and unresolvable contradictions inherent to neo-liberalism/capitalism. A car driving 80 mph towards a cliff is working, sure, but is that a desirable state of affairs?

Also take a quick look around my guy. We're not in a laboratory. I'm calling you an idiot on the internet. Not every conversation is the platonic ideal of scientific pursuit you nerd.