I work at a company that does something similar; it can be annoying to deal with these fake phishing emails from our own IT, but a 10-15 minute training session if you fail is a lot less disruptive than what can happen if you clicked the real link instead.
I consider myself a bit more tech-savvy than average, but I’ve almost fallen for a couple of these fake phishing emails. It helps me to keep up with what the latest versions of these attacks look like (and keeps me on my toes too…)