I think there's a "market mismatch" here. If you're a professional presenter, you're already used to OBS, which is complex but free, open-source, works on all platforms (as opposed to Mac-only).

Sure the "draw anywhere" feature is nice, but there are ways to achieve the same thing in OBS using a tablet (various free or paid plugins do this).

If you're not a professional presenter, sure this is easier to use than OBS, but in that case a relatively expensive subscription-only model doesn't make sense for an occasional user.