1 Corinthians 7:6-9
6 I say this as a concession, not as a command. 7 I wish that all of you were as I am. But each of you has your own gift from God; one has this gift, another has that.
8 Now to the unmarried[a] and the widows I say: It is good for them to stay unmarried, as I do. 9 But if they cannot control themselves, they should marry, for it is better to marry than to burn with passion.
It comes down to whether the individual is living as God has given them the ability to live. Some people can do it single, others can't. Some people don't have a choice.
The Bible specifically states who can be a Bishop (pastor). That doesn’t mean there are no other ways to serve, they just can’t be a Pastor. Stop focusing on the job and focus on serving where God wants you. A single man or woman being a missionary to a dangerous place is putting their life and beliefs on the line in a way that a married man or woman cannot. Each serves and each has a different role.