Hey there @Shane-Poyar and welcome to the Community. You’re experiencing HubSpot the way it was designed. Sequences, as a sales tool, are built to be a 1:1 experience for a sales person managing their own leads/contacts/opportunities at the ‘bottom of the funnel,’ while Workflows were built for marketing automation, or 1:Many, more at the top or middle of the funnel.
Since Sequences are available in HubSpot Sales Hub, you must be a paid seat and can only send emails as that user. I don’t persomnally see that changing any time soon, the way they built the platform. However, you can add the request to the Ideas forum here.
With Marketing + Sales Hub, there are some automations between the tools, but it’s still based on sales users, FYI. That’s my experience, anyway.