The Exiles don't have Warships. Their impressive fleet was destroyed during the Jihad (except one Potemkin IIRC and a Potemkin isn't a real Warship imho).
The Potemkins are IIRC armed to a battlecruiser level . . . but yeah, the Werewolf, Ulric Kerensky, Implacable, White Paw, Black Paw, and two Vincents were all destroyed because No Warships Allowed . . . and the Winter Wolf/Yggdrasil disappeared on it's way back to the Lyrans. When Warden Wolf fans asked after the the Full Moon, their Potemkin it was . . .
'Ooops . . . uh, it was destroyed too after the Jihad.'
Why are they always scuttling ships? They can't build more so they should be doing everything possible to save them. Yes the Republic and Falcons both built ships in the Dark Age era but it was massive investments for both!
As for the
warship being scuttled taking the Titan Yards . . . WHY? Unless you are driving it into the sun, it is not scuttled in the traditional sense- scuttling was done after naval battles to deny the ship to enemy forces when you were not in control of the area. The ship was sunk b/c it generally removed it as a navigation hazard and kept it from being captured. You cannot 'sink' a ship in space. The Crusader Wolves were going to end up controlling the Titan Yards- you know a place that could repair it. OR if the ship was going to be written off, it could have been scrapped at Titan . . . all sorts of bits could have been reused, or even the alloys go recycled for other uses.
But, blow the ship up . . . afaik, nothing in BTU is like say Star Trek's warp core breach that blows a ship to atoms. Blowing up a BT warship can cause navigational hazards with debris getting into the shipping lanes . . . or even flying about to damage the Yards or other Galilean system habitats.