Only if they get extremely big, and the clients cannot handle them.

> to use for people who only have low-spec equipment/networks.

These people should use light wallets or SPV wallets, which is what we already use on mobile phones.

> Vulnerability to censorship vs limited on-chain scaling -- pick your poison.

Only Siths deal with absolutes. This is a false choice.

Small blocks, and large fees, also have a centralizing effect on the network as small miners gets priced out as the transaction fees removes a larger fraction of their income.

And miner decentralization is the most important type of centralization there is, because that's what provides censorship resistance and network security.