I get the argument, and pitcher wins are definitely flawed, but I wouldn’t erase them completely.
They’re not a great measure of how good a pitcher is - way too much luck involved. A guy can go 5 innings, give up 4 runs, and still get a win because the bats go off and the bullpen holds it. Or a reliever comes in at the right time, throws an inning and gets a win added to his stats. Meanwhile another guy can throw 7 shutout innings and get nothing because his team forgets how to hit.
But wins can still tell part of the story, especially now when starters going deep into games is becoming a rarity. If a starter piles up wins, it usually means he’s at least giving his team length and keeping them in games often enough to qualify for those decisions.
So yeah, agree that we shouldn't use wins to decide who the best pitcher is. That’s outdated and for the most part majority of people around the game agree. But as a historical/context stat? I still think there’s some value there. Just don’t treat it like it’s ERA, FIP, K/9, WAR, or anything close to that.