Increasing the blocksize makes running a node much more expensive (due to storage, mainly) which in turn makes the network less decentralised. Bitcoin (rightly) selects for decentralisation over transaction speed, hence LN as an L2...
12tb harddrive: $199.
Bitcoin blockchain is increasing at less than 100gb per year. The storage cost of 100gb is about $1.6
I'm sure people running nodes can spend more than 1.6 a year to store a bigger chain.