Churches are not required to marry just any couple who asks now. Pastors have the right to refuse to marry couples they believe will divorce later and they do so all the time.
To demand that every church begin to marry just anybody who asks will be a violation of current law and religious freedom.
I’m a pastor. I have a license to solemnize marriages for the state. Neither the law nor the document I possess says anything about who I will solemnize marriages for, how many, or how often.
So, that means all interpretation is up to them.
The game will not be to get me to do something; it will be to get me to refuse to do something. Then my license can simply be revoked for ‘not being useful to them’.
My wife and I did not want to be married in our home Churches. We chose the Church my parents were married in. We had to meet the pastor, document that we were both faithful Catholics and attend pre Cana. A priest friend of mine was able to perform the Mass, but had to get permission from his pastor.