HRP takes effort, it's not easy and everyone has to put in effort to make it enjoyable.
Go roll traitor, go make a character that has a reason to be a traitor, go make a character who wants to stick it to the man, who is unhinged, who is absolutely mental.
I mean what stops you?
"I would have to think of a new backstory", well wouldn't you anyways even if you were assigned a rando?
"I'd have to think of a reason to do it", well wouldn't you anyways if you were assigned a rando?
"I'd have to start making relationships all over again", well wouldn't you anyways if you were assigned a rando?
These new traitors aren't going to take you hostage, they're going to blow your head off in maint.
These new traitors aren't going to re-consider their plot as you give them your heartwarming speech, they'll shove a shotgun in your mouth.
These new traitors aren't going to plan how to avoid capture only to make a slip-up and get caught by the long arm of the law, they're going to call you a retard and explode 5 minutes into the round as you're discussing if vests on green are valid.
To summarize, this is a mechanic that seems more like "You use it, I don't play traitor" mechanic.
Something for everyone else but you and your character so you have easy targets to plink away at who (in the hopes of creating mass destruction) include you in their RP just from the amount of ruckus they cause.
Thus, a no, this is just as dumb as giving people objectives, you want better traitors? Become one.
...the Hangman corrected me; "First the alien, then the Jew... I did no more than you let me do."
- "The Hangman", by Maurice Ogden.