You're arguing that Bitcoin needs to subsidize security through inflation because you assume the fee market won't mature. But if fiat currencies are destined to fail (as history suggests), Bitcoin will be the settlement layer for the world's wealth. If the network is moving that level of value, the transaction fees will be more than sufficient to incentivize miners. Adding tail emissions to 'solve' a security problem that hasn't happened yet just creates the same debasement issue we are trying to escape. A system that can change its monetary policy to benefit miners at the expense of holders isn't sound money, it's just a more complex version of the central banking system we're trying to replace.

Tail emission is taxation.