Of course, they can. You are exactly right, they are condensed summaries of what we believe. We can pick the one that is closest to our doctrine and practice. The Southern Baptist Conventions Baptist Faith and Message is broad enough that both Reformed and non-Reformed folks can embrace it.
And if it represents your church's position, there's nothing wrong with making sure a prospective pastor subscribes to it before your church calls him.
Outside of a church setting, I am chairman of the trustees at Mid-Continent University in Mayfield, Kentucky, a Southern Baptist school. We require all faculty, staff and administration (as well as all trustees) to either subscribe to the BF&M, or if they are not Baptist, agree not to teach contrary to it.
This does not mean a church makes the scriptures secondary to the confession of faith. To the contrary, a sound church will give priority to the scriptures. The confession of faith is merely our way of expressing what we believe the scriptures teach. And it tells others what we believe as well.