To me he seems to be saying that science may not hold all the right answers. Which is definitely a point of view, whether you agree or not.
OK, accepted.
The alternative is to stop people breeding (which in practice means to deter those peasant cultures that prefer to breed excessively), and reduce the pressure on animals living space.
Which as a fantasy alternative I'm all for, the human race can probably drop a few billion prime examples of scum before living standards revert to the primitive. In fact if the populations of South America and Africa could kindly move somewhere else, then that may yet save us all.
As this isn't going to happen before we engineer our own extinction, they we may as well pretend we have a future and research what's left.
A pity we can't just clone Pandas, save all that time wasted on making them breed.