[null0pointer]

If amount staked has no influence on inclusion or vote weight then what’s to stop a large ETH holder from splitting their wallet into several smaller wallets with the minimum staking balance and just gaining vote weight that way?

[shoulderfake]

Because the validators are chosen randomly by the network.

[grlass]

Random doesn't mean unweighted. Choose a number at random from this list [5, 10, 5, 12, 8, 5].