Question on Assigning a Pro License

I own a Pro License. There are only 2 users on my account - myself as the license owner, and my wife as a basic user. Previously when I am not using Zoom, I was able to assign my license to my wife to host meetings extending more than 40 minutes. However, lately when I assign the license to her (and I become a basic user) she is only able to host meetings lasting only 40 minutes. Why is this so?

I think it is unfair (and uncompetitive) for Zoom to expect me to purchase another license for my wife to use my Zoom account to organize a meeting, especially when we are not concurrently holding meetings on Zoom at the same time. We also never hold meetings involving up to 50 people at a time.