There have been several comments along the lines of: "Why should I trust apple and their security, but not that of a third-party web browser?"

I don't have an answer for you. But I want to recommend this talk from 7 years ago: https://www.youtube.com/watch?v=BLGFriOKz6U

That alone convinced me. Apple knows what it is doing when it comes to device security. Today, I trust them with my most sensitive data and sleep peacefully at night.