Typer is very convenient. I don't believe anyone manually parses arguments manually in Python where we have argparse in the standard library, and Typer is a step forward from that.
I really want to like typer, and frequently go down the rabbit hole of rewriting all my argparse into typer, but I keep getting put off by it's high import cost and that development seems to be a bit up in the air (see https://github.com/fastapi/typer/issues/678#issuecomment-319...). A shame because otherwise it's a really nice library!