The technology required for wormholes is so far removed from our current and plausible near-future capabilities that to throw lots of money at it would almost certainly be a total boondoggle.
So basically what he's saying is we might as well dump the money into a black hole. Sounds like most government programs.
"warp drive or a traversable wormhole is so far, far, far beyond the technology needed for a laser sail or a nuclear-pulse rocket that I would not be in favor of putting any significant resources into trying to develop it." Hmmm. But a wormhole might get us interstellar, while laser sail or nuclear-pulsed rocket , certainly not. Reaction engines, whatever the source of energy are inherently limited.. Damn Tsyolkowsky!