Actually, I fear that you are actually under the misconception.

In actuality we genuflect when we do because of where we are in relation to the tabernacle. In a traditional Church it so happens we are standing directly in front of the tabernacle when we enter the pew, thus passing in front of it, and so naturally we genuflect. Sitting is only incidental to the act. If, for instance, we walked into the same Church and turned immediately to the left to leave by a side exit we would still stop and genuflect at that same point as if we had entered a pew. Why? Because the Sacrament is directly in front of us and we are crossing in front of it, just as turning into the pew does. Sitting is not the issue at all, but rather passing in front of the Blessed Sacrament.
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If you read my response carefully, that is why I said we are genuflecting, because we are in the presence of the Blessed Sacrament. That doesn’t just go for those coming down the center aisle, but anywhere in the church. Nothing annoys me more than people who disrespect the Blessed Sacrament in that way, or any way, and I don’t care who they are, Priest or lay.
You may want to read more carefully.