The "full name" field type is very helpful when entering or collecting the data into SS; however, when it comes to using it within automation (and API?), it needs to be treated as separate filed types well so that you can use "first name" only.
Use case example:
I'd like to send a welcome email any time someone submits a ss form and dynamically use their First Name in the email template. As of now, I can only use their "full name" unless I add a formula field to break it out.