It doesn't matter how much it actually costs to make it in China, or whether the Chinese government somehow subsidizes them. The point is that Americans used to able to buy them for $1k. But now, with 145% tariffs, that same drone suddenly costs $2450 in America, with the extra $1450 going to your U.S. tax collector.
The difference is, if it actually costs $2000 to make a similar drone within the USA, but now it's your Gov't that somehow subsidizes the sales so it's sold for only $1000 to U.S. consumers, it's still your tax money that's funding that subsidy to make up the $1000 difference.
It's like Trump constantly claiming that his tariffs will make America fabulously rich, because those tariffs are all being collected by the U.S. Treasury. But it's you, the consumer, who is paying those tariffs, not China.
In his first term of office, Trump also applied tariffs against Chinese products, similarly claiming it would make America rich. But, just like they're doing now, China applied strong retaliatory measures against the US, including tariffs on US exports to China like soybeans. Those Chinese counter-tariffs had to be paid by their own Chinese importers of soybeans. And, since the price then became ridiculous, China cut way back on their import of U.S. soybeans, which hurt U.S. farmers.
So, while Trump's tariffs were making America rich from all the surcharge taxes collected from American importers, that money then had to re-applied by the billions to bail out your farmers who were going broke because they could no longer sell their soybeans to China.
Nobody got rich from that failed tariff strategy, just like nobody will get rich this time either (other than his billionaire friends who profited from Trump's deliberate stock market manipulations).