Isn't a difference? A Bounty can give you THE relic you need, it has more variety of missions and you're not forced to exit and reload the mission every minute.
Repeting hepit is #*!%ing boring, can give you countless relics other than the one you need and you're lucky if you got the one you need in 30+ tries. That's not fun. I could accept it if then you didn't need to be lucky to find the part you want when you oper the relic. There's literally no point in making the relics available only in the void (it isn't even a new prime, we're talking about unvaulted ones), and not on bounties rotations or other missions too. You don't need this way to revive the void, it makes you hate that tile even more (other that annoy people who could leave the game), and the devs needs to revive ALL the starchart, not only the void.
You are basically saying that is better for the game to grind for the relics forcing you on few specific missions than to obtain them while having fun where the hell you want.