It's important that bitcoin remains as decentralised as possible, the added value of having low value transactions directly on the L1 is not enough of a reason to compromise on bitcoin's decentralisation.
lower fee do not cause more centralisation.. its actually the opposite way round
when fee's are high users lock their value to middlemen, causing more centralisation of fund control
when mining pools get too much profit. they buy more asic farms to centralise the hashing. but the distributed hobby miners due to not having great deals on electric and hardware cannot buy as many asics in one go to compete.
when pools take a 2% cut of reward + X% of fee's they can expand their single location asic farm faster than hobby miners distributed around the world getting only 0.000x% share of reward+fees