However if a Billionaire did have the largest carbon footprint, would you still criticize if they bought credits to offset to be net 0? Or some other real practice to become net 0?
No, carbon credits are like beating your wife and then donating money each month to a battered women's shelter - virtue signaling at its worst.
No matter how many credits they buy, they are still disproportionately polluting the environment - donating money so that 'maybe' somebody else doesn't pollute as much, hardly undos the damage.