For those who also weren't sure, I learned that this is an actual quote from Mr. Musk to a U.S. Senator and Senate Finance Chairman.

https://twitter.com/elonmusk/status/1457497438474981384

I infer the point to be that Mr. Musk trolls so frequently and thoughtlessly that it's impossible to tell whether he believes the things he's saying, which is why quotes from him are mostly worthless as guiding principles.