main benefit is incentive for miners, second - compensation for lost bitcoin.
if one day miners will not have incentives to mine you will not have incentives for hodl. or fees wlll go trough the roof.
I'm not sure if just enrichment of 1% hodlers is the best future for bitcoin.
but of course it is almost impossible to find proper value for this inflation.
it will be very weird if one day all bitcoin will be sitting in wallets not moving. so we invented new form of diamond?