Why Would God Choose to Have Two Different Authors Express Justification?

Why would God choose to have two different authors express maybe different facets of the same doctrine or of broader salvation that we're experiencing in such similar and yet seemingly contradictory ways? I know that's kind of a speculative question but have you ever wrestled with that like why would he even have James use the same phrase that Paul uses essentially justified by faith. hmm that's such a helpful reminder that as we come to scripture to read and interpret what it says we do need to come with that confidence in its inspiration and inerrancy.