Boundaries are a thing.

If and when something in a therapist's health/life, etc. impacts their practice, then yes, they should address that IF they are unable to find a workable solution. But if their ability to continue therapy is not impacted, no, it really isn't our "right" to know their private business. And, even if it requires changes, I don't necessarily think we have a right to the details of their situation; general explanation is often all that is really needed. We all have a right to keep our personal information private as much as possible.