It's because devs think there are security trade-offs if a chain needs to rely on a functional uncaptured fee market at all times.

It's not that the Monero community thinks its disinflation makes it superior to BTCin terms of economics (although some people argue in that way comparing it more to gold, but scarcer).

It's mostly about healthy long term incentives for miners.

I don't get why people freak out over something with less annual inflation than gold (and currently less inflation and circulating supply than Bitcoin for that matter)