Actually there is an option in the meetings policy to disable sharing, so internally you could set these differently! But these are not related or care about who is the organizer! So it might not be a good idea either!
Also, people without assigned policies like guests, anon users , federated etc inherits the orginizers policy , which in this case should be set to allowed which will also just go against the idea
https://docs.microsoft.com/en-us/microsoftteams/meeting-policies-in-teams