One can be celebrated in this world for Speaking Truth to Power, but if you actually "Speak Truth to Power," you get squashed like a bug. If you want to see what the fate of truth to power tellers is look at the White Rose and Franz Jägerstätter not to mention people who merely whispered truth and got into the maw of the Gulag.
The voice of humility does not speak on subjects like heredity or genetics because we possess only the dimmest understanding of the science. We do believe that we possess normal human powers of observation. As to our environment, suffice it to say, there is no equality anywhere whether amongst individuals or groups. To say otherwise is to be willfully blind.
Now Mr. Watson was not speaking to "Power," but "Power" overheard his conversation. I don't want to get into why he caved because he may have had some very important reason for doing it. However, had he told his oppressors to take a hike, the victory for truth telling may not have been decisive, but it would have been welcome.
It is also to be noted, it does not appear that he made his remarks about Africa and her children with either joy or rancor, but with a tone of regret. His statement of pessimism regarding that continent helped to land him in hot water. It would be interesting if his critics could be polled so we could find out who of that ilk is optimistic about the future of the "Dark Continent."