Why do people think a secondary makes a beer clearer? You think the yeast are like "it's crowded down there bro, I'm going to wait till secondary to flocculate" no.
Look at your primary on day 10. The top is much clearer than the bottom half. When you rack to a secondary you impede the progress of it clearing by mixing it all up again.
I'm not even going to address the off the myth about off flavors, just like I'm not going to argue with anyone about gravity. Fools at a distance thing.
If you secondary, there is no harm, just honestly say it is because of how you were taught, or because you are superstitious, or because you had a bad anecdotal experience from not using a secondary that is contrary to what is a generally accepted rule among expert home brewers. What is bs is people thinking racking to a secondary vessel does anything positive to it, because it doesn't.