Does anyone have any like valid or reasonable reasons why Guardian Angel should exist?

I dont think this item should exist at all because usually the main carry of your team would build it and lets say they go in, eat three enemy ultimates and respawn while the rest of your team collapses on the enemy. Under like a different perspective you could say that he baited them But its not really a bait if you're literally FORCED to try to kill them because they're the main carry. I feel as though the item is too game changing especially when built on a tank. I dont really see a reason for this item to keep going