Licensing for webinars and meetings when they can't run concurrently

I understand an account can NOT run a meeting and a webinar concurrently. Assuming there is a technical reason for that, I can accept that.

However, why can't I assign the meeting (Pro) license to a different account? Why do we have to pay for a Meeting license for the account, when we can't use the meeting license that we paid for while we're using the Webinar license that we paid for? The end result is I end up with a 2-meeting license that we pay for but can't use.