If it wasn't the CCP, it would be Russia again, or if not Russia, then another emerging power. In 10 or 20 years it could be India, or the fragmented parts of European Union that combine to form authoritarian regimes if the swings toward autocracy continue.
Every military force is investing in drone technology because any military force in the world is investing in drone technology, and while the US was the leader for a long time, the push to outsource manufacturing and globalization led to a broad distribution of the skills, tools, and manufacturing base to build modern drones.
China is no more the root cause of the arms race than Thog was when he hit Ugh with a stick some time in ancient history. Its humans and tribalism all the way down.
You're not considering the historical consequences of your perspective. And I made no such claim that China is the root cause of the arms race, that's a strawman.
Historical counterfactual: What would've happened in WW2 in Asia if the US had no aircraft carriers because some pacifists convinced the administration that investing in arms was just tit for tat tribalism and contributing to an arms race?
If you can't explain why the US should not invest in drones today but they should've invested in aircraft carriers in the 1930s and 1940s, then you're holding a sack filled with little more than misplaced confidence.