A bypassing FO is filling the sic column with worthless hours. A bypassing FO is typically bidding the most lucrative trips (giving other FOs less productive flying). A bypassing FO is getting a lot of days off and likely picking up a lot of flying. Having people sitting on the top of the list in either seat is a bad thing.

I don't see how you can think a right seat captain is the equivalent of a scab without understanding how a bypassing FO hurts other FOs at a greater level.

As I've said before, if you allow right seat captain's you essentially do not need reserve first officers (reserve captains can do that flying). The company can have enough captain's on reserve to cover FO and CA flying. This encourages the company to upgrade and keeps FOs off reserve. I do not see why this is a bad thing. Would you rather be on reserve looking to pick up flying or a line holder?

Maybe agreeing to disagree is appropriate.