This might be incredibly easy to fix depending on how this check is implemented. Currently RUF027 can be triggered by something like:

from typing import TYPE_CHECKING
if TYPE_CHECKING:
    from datetime import date

path = "foo/{date}/"  # RUF027

Now, to be fair, this would also be a false positive for a runtime binding. But this seems like an easy low hanging fruit to reduce the false positive rate at least a little bit.

Although a more reliable solution long-term would be to add a setting for specifying additional methods which expect a template string.