Not sure where the ethical concern comes in, if you're abiding by the return policies. The Music Room literally expects people to try and return things, so I'd think that other companies must expect the same, or at least they should if they want to stay in business.
Why not start buy buying a couple of headphones from TMR: https://tmraudio.com/personal-audio/headphones-over-ear/
"Every product we sell has undergone a rigorous testing protocol and is backed by our 14day satisfaction-guaranteed return policy (when purchased at www.tmraudio.com), along with a 45-day warranty. In short, we want to make sure you are 100% satisfied with your purchase."
Why not start buy buying a couple of headphones from TMR: https://tmraudio.com/personal-audio/headphones-over-ear/
"Every product we sell has undergone a rigorous testing protocol and is backed by our 14day satisfaction-guaranteed return policy (when purchased at www.tmraudio.com), along with a 45-day warranty. In short, we want to make sure you are 100% satisfied with your purchase."