Well, the thing is, you ask why raiders care if it somehow invalidates their time, but yet people like you still dodge the question of *why* do you need i370 gear then to begin with. You're not really answering their question either and instead, you're kind of shifting and moving the goal posts. Why does other players who only want to grind out Eureka which yes, you will spend a long time in earning said gear, need i370 gear at all? I don't think people spend 100's of hours like you say with Savage.
The first two tiers of Sigma can be downed within 2-5 hours, the loot you get is completely RNG based, that is not the case in Eureka. You spend time earning the required pieces for your chosen job, it's a constant variable. Savage is not. You'll get a constant variable with a log dropping for the week, but one book is physically not enough to get anything in the first run unless you get lucky. It takes 4 red books to get an accessory, 6 red books to get a belt, 6 yellow books to get a head piece, 6 yellow books to get a hand piece, 6 yellow books to get a foot piece, 8 green books for a leg piece, 8 white books for a weapon, 8 white books for a body piece, and 3 white books for the shield.
Eureka does not have RNG loot drops, it has a constant reward at the end of it's grind that you can use immediately. Savage has a book that you can't use until you get more unless something drops from a chest that was for your job and also, something that hasn't already dropped beforehand, not to mention it's possible for BOTH chests to drop the same item. You're also rolling Need and Greed against 7 other people, that does not exist in Eureka either. You're not spending the same amount of time in either Eureka or Savage for gear as the fluctuations in Savage make it impossible to measure the two every week when there's a lockout. The only idea of spending the same amount of time possibly on Eureka and Savage that could be comparable is when the lockouts are unrestricted.
It takes 4 weeks to earn yourself an i370 accessory, 6 weeks if you want the belt, head, hand, and foot piece, 8 weeks to get a leg, weapon, or shield. The point of getting raid-tier gear is to make it easier on yourself in the higher tiers. Tiers like Guardian and Kefka require a player to have most of the gear that they can get from Doom Train and Chadarnook. That is the point of the raid gear being slightly higher and better in terms of stats. That is literally the main point. They're like small stepping stones of progress for people.
Swallow's Compass doesn't require any of that as you can pretty much overkill everything even in the basic i350 Carb stuff.