Yes, there could be women who sang culturally but try bringing them into the tabernacle and you might have some trouble.
I'm sorry but you have not shown me Scripturally where women are allowed to sing in a group but not solo in a church.
Now, is this not a particular problem for you? Did you change your thinking?
It is YOU that has consistently argued AGAINST women being silent in the church, and here you state that it would be a problem in the tabernacle for them to sing even as a group.
Seems you are using your post as a proof of Paul's statement being born out in an Old Testament example?
If you recant, then you would have to show that women did in fact sing in groups at worship.
On the other matter, to the practicing Jew all things revolve around their identification with the religious and ceremonial traditions, even down to the clothes they wear. The Jewish folk considers a Jew a Jew until there is a denial of the religion and then that "former Jew" is considered dead.
The believer is to have that same way of being. There is no separation as to sacred and secular. A believer is considered a believer until there is a denial of belief and then that person is to be cut out and off from the body of believers.