Yes - you can use thicken interior and put a positive or negative number (to reduce thickness) to adjust it. You can get it to work that way with a little trial and error. The reason the blade thickness doesn’t apply to the inside is that the standard imprint is meant to make a stamp and not a blade, so it will use the thickness of the line (or other shape) you upload.
However, there is an easy solution: a better way to make a cutout cutter where both blades will use the “blade thickness”. You just need to fill in the image and use edges only - See here: How to create a 3d printed doughnut cutter with center cut out using Cookiecad