I think it’s safe to say that bowing and prostration mean different things to different people, and should not be placed as stumbling blocks to the weak. To him to whom it is divine worship, he should not bow nor be required to bow, and to him to whom it is not it should be permitted if felt necessary.
I think St. Paul wrote at length on these sorts of scandals.
I think your points are wise and accurate.
I was happy to bow on greeting and leaving in China. Had no hint of worship, for me nor for anyone watching me do so.
I bow to the Lord during worship almost every Sunday. This week the worship was so anointed that two women lay prostrate on the floor of the church and one was kneeling. In our church, it’s common when the Spirit of the Lord comes upon us, especially during worship. It’s quite beautiful.