Question about what constitutes a "host"

At the "Roles in a meeting" page on the Zoom website I read the following "Host: The user that scheduled the meeting. They have full permissions to manage the meeting. There can only be one host of a meeting."

My question is, what constitutes "The user that scheduled the meeting"? This is my understanding of that statement: If a "user" signs into a Zoom account with a specific email and password, and schedules a meeting, the "user" is the specific email and password, not the actual person who typed in the scheduled meeting. Later, if a different person signs on to that same account and starts the meeting, that person is the host. So it is the person who STARTS the meeting, not necessarily the person who SCHEDULES the meeting who is the host, as long as the person who starts the meeting signs in with the same email and password as the person who scheduled the meeting. In other words the Zoom software only cares about the specific email and password used to schedule and start a meeting and cares nothing for the person who typed in the specific email and password, or from which device.

If this is correct, I have another follow-up question. I know it is possible to allow participants to join before the host. In fact, if this parameter is set, the host need never show up, and the participants can meet for as long as the specific account allows. My question is this: is it possible for the person who schedules a meeting, at the time of scheduling, to assign another participant who will later be in that meeting to be either co-host or alternative host at that meeting which the scheduler will not attend, and which no one will sign in with the same email and password under which the meeting was scheduled?

Thanks

Jack