There's simple trade-off between decentralized and bandwidth requirements. If you raise the limit you reduce the pool of those that run full nodes thereby centralizing the network at which point you're undermining the point of a decentralized ledger.
https://www.youtube.com/watch?v=92AYj_9W7x0 - Why is Block Size 1MB Andreas Antonopoulos
There's simple trade-off between decentralized and bandwidth requirements. If you raise the limit you reduce the pool of those that run full nodes thereby centralizing the network at which point you're undermining the point of a decentralized ledger.