Because the Templar ceremony looks like a wedding.
So Charles' family is Old Money, right? His father was a general and his grandfather a baronet and politician etc. And like women in those times, I would guess Omegas would be married off to secure family ties via children. The Templars very much like to be tied as intimately as possible into the ruling class. So as a secondary demand for Charles' joining, they ask him to become Braddock's mate so they can get some babies.
Enter Haytham. He thinks Charles deserves a better mate. Besides, Braddock is going to get a dishonourable discharge form life anyway. Whether he just takes a liking to Charles or you go the soulmate route doesn't matter. Braddock, of course, is not amused.
Haytham/Charles, Omegaverse
So Charles' family is Old Money, right? His father was a general and his grandfather a baronet and politician etc. And like women in those times, I would guess Omegas would be married off to secure family ties via children. The Templars very much like to be tied as intimately as possible into the ruling class. So as a secondary demand for Charles' joining, they ask him to become Braddock's mate so they can get some babies.
Enter Haytham. He thinks Charles deserves a better mate. Besides, Braddock is going to get a dishonourable discharge form life anyway. Whether he just takes a liking to Charles or you go the soulmate route doesn't matter. Braddock, of course, is not amused.