This feels like a false narrative.
Samsungs provides 3-5 years of updates for current mid and high end phones. Does your iPhone last 5x4=20 years? Will it be worth much even in 5 years? But if you trade it only after one year, how does that in any way reduce ewaste?
When I got my current phone it was 1/3 of an iphone and 1/5 of the most expensive Samsung (the fold thingy). It works well and is guaranteed at least 3 years of updates. But I plan to use it as my daily driver for 2 years, maybe 2.5. After which I will probably keep it and use it for something else around the house.
Moreover, when it comes eventually replacing the iphone, I'm going to get a better trade in value than the android even if it's 3-4x older. Thus lowering the cost of my next phone. (less ewaste bc i know the iphone will end up in someone else's pocket, not in a landfill)
Maybe Samsung is different, but when I went to trade in my $7-800 Motorola after 8-12 months of use, I was offered $28 trade-in value.
My time is also worth money. I don't have time (money) to waste on dealing with android.