The science as we know it is pretty well defined. Involving generating precise hypothesis, doing double blind experiments, evaluating results and making predictions, submitting to peer review for result reproduction.
But TCM would have none of these, so no, it's not "due to bias".
There are always cultural biases. There are always choices of interpretation. Our science does not spring forth fully formed from the observation of phenomena after all
You really don't understand the very definition of science.
It's a means of predicting the success of a hypothesis. It is not a collection of beliefs.
There are plenty of successful hypotheses that science has "proven", which are now accepted by the "scientific community", but the word has an actual definition.
But TCM would have none of these, so no, it's not "due to bias".