I think your view is a bit optimistic - centers in North Africa won't fix the systemic issues with our border policies. Frontex absolutely does send people back to places where they face torture and sexual violence. They've been repeatedly documented performing illegal pushbacks in the Mediterranean and the Aegean.
They're actively pushing people back to Libya where EU-funded detention centers are effectively torture camps. And Frontex continues illegal pushbacks regularly despite court rulings against them.
There's extensive evidence of this: https://www.theguardian.com/world/2019/nov/03/libya-migrants-tripoli-refugees-detention-camps
I understand wanting to believe we're better than this, but the facts don't support it. The "we're decent people making mistakes" narrative is comforting but doesn't hold up when you look at the policies we collectively support through our governments.
About the "high value migrants" thing - that's exactly my point about how our immigration system works. We welcome people based on economic utility, not humanitarian need. We'll roll out the red carpet for an American engineer but let Syrian doctors drown.
And this economic utility approach is still fragile - when the economy turns, even the "high value" migrants become scapegoats. Just look at how Brexit campaigns targeted Polish doctors and Eastern European professionals despite their contributions.
Yes, it’s the same. If you want to educate yourself about the topic read Israeli historian Ilan Pappe or Palestinian philosopher Mohammed El-Kurd.