Why do people only compare player from different ERA using WAR and not considering all stats or how good a player really was in his time based on how the game was in the era of that player. I will never understand it.
Truly Understanding what WAR is meant to be use for
https://library.fangraphs.com/misc/war/
Here is an article
Here is part of that article
Stop the WAR?
Given how frequently it pops up in sabermetric discussions, WAR might sound like the pinnacle of sabermetrics. But no stat is perfect, and WAR is far from it.
The "godfather of Sabermetrics" Bill James wrote about his principal gripe with WAR, discussing the MVP race between Jose Altuve and Aaron Judge:
“Aaron Judge was nowhere near as valuable as Jose Altuve. Why? Because he didn’t do nearly as much to win games for his team as Altuve did. It is NOT close. The belief that it is close is fueled by bad statistical analysis — not as bad as the 1974 statistical analysis, I grant, but flawed nonetheless. It is based essentially on a misleading statistic, which is WAR. Baseball-Reference WAR shows the little guy at 8.3, and the big guy at 8.1.”
James’ argument represents the principal criticism of WAR — WAR is context neutral. If a player recorded only one single per game for 162 games, but that one single knocked in the game-winning run every game,WAR would credit that player with exactly as much value as a player who did the same thing but his team lost every game.
As a result, it would seem as though WAR is undervaluing the first player, and overvaluing the second player. Judge consistently performed poorly in high-leverage situations: he recorded the worst Clutch score of any player in 2017 per FanGraphs, despite leading the MLB in fWAR.
But in the words of Bertrand Russell, “WAR does not determine who is right…” so don’t think that WAR is the be all end all to every statistical discussion.