It’s amazing how often you’re wrong about a position you (used to?) play and seem to have a particular interest in. You come across as though all that matters to you is finding an angle to slag off Onana, even if this means a few you end up talking total nonsense.
Waiting and reacting is a perfectly legitimate approach. In fact if you think back to when Pickford’s notes from the Euros were caught on camera there were three different options laid out for him, depending on the taker. Left, right or react.
So no, a keeper shouldn’t
always pick a side. That would be a stupid approach. Sometimes it pays off to wait as long as possible and react after the kick is taken. And that decision will be influenced by research about the penalty takers and the strengths and preferences of the keeper.