Well you are arguing semantics. He's a pretty good pass rusher or you wouldn't be talking about trading for him for such. It's his pass rush talent/ability I am weigher here, not actual specific stats (which I used to express that pass rush ability). And yes, the Eagles didn't have double digit sack guys because they had so many pass rushers... which is my EXACT point. It's not a luxury, it's a strength. It's the core of their defense.
I think he can be a good pass rusher, but it's not semantics to say calling him a double digit sack guy isn't accurate. That frames the convo in a different way. But whatever, the language isn't a big deal on that. We're on the same page. But further on that, for the "you wouldn't be talking about"... I could basically use the same logic you did, but ask another way. If he was a high end pass rusher that's only 24 years old, we'd not be talking about a 3rd round pick for him. They'd probably be able to ask for a first, if not multiple firsts. It works both ways. That speaks to what he is.
And, it is a luxury or everyone would do it. The Eagles would've paid to keep Sweat. The Eagles wouldn't have traded away Redick. And, the Eagles drafted well and it gave them that luxury. They didn't burn away premium assets. They took guys like Sweat and Hunt with later picks. The investment the Giants are doing is totally different. I'd also not say they have "so many pass rushers". Their 3rd edge had 3.5 sacks last year. I think they had like 2.5 sacks in the entire playoffs. This is like the Bears getting a 4th pass catcher when the OL sucked last year. Then we watch as all the pass catchers have career lows and all their values are decreased. The Giants are a horrible team and the Eagles have been consistently seen as a contender. And they've paid none of them like Burns. All of the edges on the Eagles roster combined make about the same as Burns. When you factor in Kayvon's upcoming contract, you can either drive down his value by waiting, and watch him leave for better pay, or you can overpay for a 3rd guy in snaps.