Hi @PjP1 
As far as I’m aware, the HubSpot Email Click/Open properties are read-only (i.e. they are system data fields that are defined and populated by HubSpot based on their own email analytics data collection). You may be interested in using HubSpot’s Custom Events API and then potentially manage some HubSpot custom properties using these events as automation triggers. I’ve not used this API for email analytics events specifically, but it might be a good fit for you use case.
Please let me know if you have any follow up questions.