Dense interfaces often shrink their labels first. That makes the screen feel quieter, but it can also make the most useful details harder to find. A timestamp, unit, or status can change what a number means. It is not supporting decoration.
Instead of reducing every label by the same amount, decide which details people compare and which ones they only need occasionally. Keep the comparison visible. Move background detail into a disclosure or a nearby note, where it remains available without competing with the main task.
Then check the page at its real viewing size. A label that looks crisp in a zoomed design file can become tiring on a laptop or phone. Reading comfort is part of the information hierarchy, not a finishing pass.
Use small type sparingly, and keep the details that change a decision easy to read.