It’s a dick move, but I can kinda understand why SpaceX would make it. There has been a push to “de-risk” supply chains, after the disruptions caused by Covid, Russia’s invasion of Ukranie, and other world events. This type of de-risking was partly responsible for the CHIPS and Science Act. The US Government has a strategic incentive to have a stable and resilient supply chain for semiconductors.
For SpaceX, having critical components be only available from fabs in Taiwan is a risk to business. China has been more and more vocal about it’s desire to annex Taiwan. With Trump taking office, one can imagine that the US commitment to protect Taiwan may not be quite as iron clad as it has been in the past. It’s not hard to imagine a future where China launches an invasion of Taiwan and the US does little more than shrug. At that point, any business which is solely reliant on Taiwan for semiconductors is going to see major disruptions.
So ya, it’s a complete dick move. But, I suspect SpaceX will be far from the last company looking to build a supply chain outside Taiwan.
Do you really want Musk starting a game console company?