Hi @KLR,
No, this is not possible. Email personalization always refers to the values in properties on the contact record. You cannot reference form inputs directly.
There should however not be any instances where the contact property value is different to what is submitted in the form - as that information is saved directly to the contact record. If you have an example of this, I can share my assessment.
Something that can happen, yes, is that a property already holds a value and the form field is not filled. This means that the contact property value won’t be updated but in the email it will look like it came through the last form submission, despite being an older value.
Best regards