Exactly. Apple executives threw macOS under the bus in the Epic trial, saying that its capability to run arbitrary software makes it unacceptably insecure (e.g. https://www.theverge.com/2021/5/19/22444353/mac-malware-not-...). It shouldn't surprise anyone if a future macOS version requires a paid developer certificate to run unapproved apps or access the Unix layer.
MacOS is indeed unacceptably insecure. Imagine someone downloads FortniteForMac.app (as in, a fake Fortnite for MacOS download since it's not available except on Windows right now) - that can lead to a keylogger and clipboard watcher beaming your data to some foreign data lake, where it'll soon be used to sign into your Bank (proxying requests to your computer to appear less suspicious, of course).
