I usually find the opposite. Firing someone for cause is interminable or outright impossible, unless they're breaking the law or embarrassing you in front of customers.
I have only once fired for cause. Every other time, I’ve gone through the process, the PIP, and then terminated them according to their contract, usually with “more generous the legally or contractually required” severance. Let’s me sleep at night and has the nice side effect of keeping the peace with the remaining team.