It shouldn’t increase because simulations of increasing blocksize have demonstrated centralization. If we didn’t care about decentralization we’d just use a database.
Tl,dr: each additional kB after 1mb adds an additional 80ms in propagation delay. It’s not just bandwidth that’s the problem. Nodes need to validate the block, then communicate that block to other nodes who also need to validate. Big blockers are drinking Roger Ver koolaid. The man doesn’t even know how to program, yet has convinced an army of redditors he knows best.
Because miners on the other side of the world don’t hear about the latest block until much later than other miners? Miners who hear about it first get a head start mining the next block. If the delay is significant, you get a single mining cartel.
Mining a block is suppose to be a lottery, not a race.