Wouldn't they do the same if it was France poaching them? The language and cultural barrier make it harder for European or American countries to recruit them, but I have no doubt they'd react similarly if they saw significant numbers leaving for Europe.
Then just do a sanction on business with mainland like U.S. did with Iran. As it is, these are very targeted moves. Taiwan to decoupling from China would only be good for them.
The CCP is a direct hostile threat to Taiwan, I can understand why they're doing this.