Yes, but you also have to know a rookie QB rarely performs that well in their first season. Look all the best QBs in the league and see how they did in their first year. I'm not saying their first year starting, but their first season. Look at the rookie seasons of Josh Allen, Kyler Murray, Patrick Mahomes, Lamar Jackson and Deshaun Watson, etc...
All their rookie years were essentially a 'learning season'. If you like Kirk Cousins or not, his 2020 numbers of 16 games started, 67.6 completion percentage, 4265 yards, 35 tds, 13 ints for a 105 passer rating is better than any rookie will do in 2021. If that's around his floor you gotta like that for 2021.
Now if you are looking past this season and asking who will be better going forward, then no kidding I'd take the 22 year old first round pick over the 33 year old vet.
I took "QB situation" to mean more than this year, but for this year and beyond.
But to argue for the sake of it, Patrick Mahomes first real, full season was his MVP 50 TD season. Same thing could essentially be said and Lamar Jackson who was inserted at the end of his rookie year, but his first full season was an MVP year. Both those guys style seemed to take the league by storm their first year and have since slightly cooled off.
Also, Justin Herbert had a great year this past season, very similar to Kirk Cousins stats with not as good skilled players.
But with that said, most of these top rookie QBs are going to teams with depleted rosters. Many don't have a true #1 receiver yet. In many cases they are scrapping the roster and going through a complete rebuild. They are usually not inserted into a position to succeed. The odds are against guys like Zack Wilson and Trevor Lawrence because of this exact thing.
I agree though that Cousins had a very good, underrated year last season. Once Justin Jefferson got going, their offense was very formidable. Dalvin Cook, Thielen, and Jefferson are certainly the best skilled position group in the division. But in the end, Kirk Cousins is just not a winner. When the game is on the line, he usually comes up on the other end. Sure though, the Vikings supporting cast is better for their QB to succeed this year.