You're not answering the problem as it actually stands, you're instead using perceived similarities to argue it's some other problem, or to posit further elements (like simulated versions of yourself) that would affect the situation drastically.

With Newcomb's problem one properly one-boxes. The unknown state of the box is entagled with your decision, so by one-boxing you're acausally affecting the likelihood the non-transparent box has 1.000.000. This works even for Omegas with less than 100% probability of predictive success.

With this problem, your existence is a certain fact. You don't need to entagle anything, because you exist and you'll keep existing -- in any universe where you're actually making a decision, YOU EXIST. You only need to grab two boxes, and you'll have them both with no negative consequences.

This has absolutely NOTHING to do with Quantum suicide. These decisions don't even require a belief in MWI.

On the other hand, your argument essentially says that if your mother was a a Boston Celtics fan who birthed you because she was 99.9% certain you'd support the Boston Celtics, then even if you hate both her and the Celtics you must nonetheless support them, because you value your existence.

Or if your parents birthed you because they were 99.9% certain you'd be an Islamist jihadi, you must therefore go jihad. Even if you hate them, even if you don't believe in Islam, even if they have become secular atheists in the meantime. Because you value your existence.

That's insane.

You're not doing anything but invoking the concept of some imaginary debt to your ancestors. "We produced you, because we thought you'd act like this, so even if you hate our guts you must act like this, if you value your existence."

Nonsense. This is nothing but a arbitrary deontological demand, that has nothing to do with utility. I will one-box in the normal Newcomb's problem, and I can honorably decide to pay the driver in the Parfit's Hitchhiker's problem, and I can commit to taking Kavka's toxin -- but I have no motivation to commit to one-boxing in this problem. I exist. My existence is not in doubt. And I only have a moral obligation to those that created me under a very limited set of circumstances that don't apply here.