Well, not to sound condescending, but if I'm writing about the past, the present and the future, it's a bit of a no-brainer. When I'm removing older players, I'm obviously talking about the future. And the future is not the present or the past.
Hope this clears things up.
Oh, and the topic of this discussion is how good each national team is.
The quality of the domestic league provides depth and is indicative of the breadth and depth of your overall talent pool, with certain caveats. This is a suppporting side-argument, which is not really central in this discussion and we could as well ignore it.
How good the DEL and NL are have little to do with how good German and Swiss players are. Those leagues are strong because of their strong economies and capability of enticing quality foreign players. Using this logic, Slovakia has never been good at hockey, because even at their strongest point, Slovakias best players outside of the NHL resided in Sweden. But yeah, this is all a moot point which we can move on from.
As far as the future goes, it's evident that Germany and Switzerland have ways to go before closing the gap to Czechia. Switzerland is actually trending downwards in the last 5 years compared to the previous 5. Not to mention that Czechia is still producing draftees at 4x the rate of Germany and Switzerland. With that kind of quantity, you're likely to develop a few quality prospects here and there.
When Slovakia's upcoming prospects enter their primes, Draisaitl could very well be on his way out of his. And nothing about Switzerland's last four drafts and next two drafts speaks in their favour against Slovakia. Not saying that Slovakia is about to reach their golden days again, because it takes a lot more than two or three good draft years for that to happen. But that's also why Germany and Switzerland still have ways to go, and I'm saying this as someone who wants hockey to grow in all countries.