Your reasons might be right re the bush lawyer who sat around thinking about how to put it into legislation to irritate pilots.
However, one can get permission for early right turns (I have forgetten the reg
) when twr is operational, so the argument for wrapping the pilots in cotton wool so they keep themselves out of some perceived trouble does not hold water.
As for when is a suitable time to turn, the pilot's ability and the complexity of the aircraft will dictate when the aircraft is tidied up to start turning.
Having said that, I do not mean flying like the C172 turn near the start of the 007 film "The Living Daylights"! Must be a 60deg AOB turn seconds after rotation with the wingtip about 1 foot off the deck
.