Lol - I dont even have autobrake as I fly the CRJ - so to me this seems like a "theoretical" discussion.
The CRJ200 is a runway intensive little plane, cat D approaches into short runways - all with manual braking and manual throttle btw. We do it safely and consistently day in and day out, in sunshine, in rain, in snow.
Surely that can be safely and consistently done in a B737 too - if not I think the problem lies elsewhere.
So from that perspective I dont really see what all this fuss is about.
What is it that drives us to operate at the highest level of automation at all times?