I think the nuance here is if you tailor ALL interviews for a specific job based on each candidate to the point where the interviews are no longer directly comp

I think the nuance here is if you tailor ALL interviews for a specific job based on each candidate to the point where the interviews are no longer directly comparable, that could constitute a hiring practice that would run afoul of some laws in various places. However, what you're describing sounds reasonable to me - you're offering the same overall interview structure, just tailoring the question to delve more into someone's bespoke experience. That's a hell of a lot more work than a one size fits all (ala leetcoding style) question - kudos to you.