Absolute scarcity is a bullshit term, better for entrancing the minds of the already convinced than persuading those who aren't.
It's trivial for someone to make a shitcoin that's more scarce then delete the keys so it remains forever more scarce.
But we don't care if something else is absolutely more scarce, because Bitcoin's scarcity isn't nearly as important as its:
• uptime
• network effects
• verifiability
• permissionlessness
• difficulty to censor
• resilience
• predictability