The requirement to listen to the Chachomim even when they are wrong is only in reference to the Sanhedrin. In the post-Talmud era, where there is no centralized body about which there can be a “nimnu v’gamru” a person who concludes, after learning up the sugya, that the halacha is not like the majority of poskim, is not required to follow the majority, and should not follow the majority. In the present day there cannot be a zaken mamre.
Now if one’s conclusions are far from the norm, it would be wise and prudent to discuss the sugya and hash things out with another Talmud Chacham but if at the end of the day you still believe you are right you have to follow the halacha as you see it, not as others see it.