The states aren't very logically consistent on ID laws. Illinois requires an FOID to bear arms but not an ID to vote. Arizona requires an ID to vote but not one to bear arms. Vermont is probably the most consistent non-ID state, not requiring an ID to vote and also not requiring an ID even to conceal carry a gun.

I can sort of buy the ID argument from places like Vermont but the arguments in many/most states are just complete bullshit where they've worked backwards to rationalize it and that's why there is no consistency for ID gating of rights within even the same state.