Scripture teaches us that God rules over all, including those who refuse to recognize Him.
His Word is the truth. Man cannot define marriage apart from God’s Word and expect it to be valid. God does not validate rebellion.
But man DOES define marriage - even though God does not validate it. As I said - before - Man makes his own rules - even if they are wrong - and since we live in this society - it will happen. Granted we should do what we can - and since the Devil is the god of this world ( 2 Cor 4:4) it will probably just keep getting worse, until the Lord returns.