What are your opinions on having confirmation buttons (like ‘Okay’, and ‘Cancel’) in dialog boxes?

One thing that I have observed in macOS; coming form a Windows box is how the system settings, and other dialog boxes don’t contain any confirmation buttons; the settings are applied as soon as you manipulate them. For critical settings you have a lock icon which needs an administrator password.

Where as in a Windows, you have to deal with ‘OK’, and ‘Cancel’, which in IMO is more straight-forward; but probably I am biased because I have been a Windows user for a long time.

What are your opinions on this topic?