He says moats are dumb, not that they don't exist. Moats don't provide lasting protection because it doesn't take long for competition to devise a way cross the moat.
True enough, verbally. The implication, however, is that 'are dumb' means they really do not work.
Historically moats admittedly did exist, even though warfare improved enough to make them useless.
In the context used here, the notions that a 'moat' provides long term protection from competition.
Think of, only in the last few decades: Xerox, Kodak, DEC, and so on. Even with patent protection Aspirin, Kleenex and so many more examples.
So, I admit that the precise wording was 'are dumb', which in turn means that the nation does not provide protection form innovation, thus does not exist.
With Tesla, partly because of SpaceX, there are:
-BMS incorporating a proprietary inconel use for precise temperature control;
-Octovalve;
-proprietary aluminum and more enabling ...
-Gigapresses;
-Grüneheide paint shop;
-structural battery pack;
-4680's
-many sensor types including the infamous Model X door ones;
- wide array of motor, inverter and other powertrain elements;
-Dojo;
None of those provide permanent protection, so are not 'moats' though some describe them as such.
The only sustainable advantage is continuous innovation driven by an endless quest for improvement.
I rather suspect we all agree on that, despite quibbling over vocabulary.