I started this hobby doing lots of reading and got myself into a panic about chilling quickly to avoid infection and the dreaded chill-haze.
20 batches on, I'm not convinced that fast chilling is that important in the grand scheme of things. The decision to chill quickly or not is made based on how much time I have, not so much on how it will affect the beer.
Small batches I just shake the glass growler for oxygenation because it's easy to do and no reason not to. Larger batches I bring out the electric drill, takes 5 mins including sanitising / cleanup, cost nothing. To be honest I haven't brewed enough to form an opinion on whether oxygenation is worthwhile or not, but since it's such an easy task I'm happy to continue doing it in order to remove one potential (real or percieved) trouble point from the process.