The casual fan should not be using WAR, if they don't know what it means.
Both Piersall and Jensen gave the same total value to their team, but over way different lengths of time.
I'll ask you if you think this was fair:
When Hank Aaron broke Babe Ruth's HT record, did the casual fan know or care about the fact that he had over 3,300 more PAs than the Babe? What a rip off that HR stat is! Only brainiacs can figure it all out!
Red Sox fans know how great Ted Williams was, and some of us have gone back and looked over his numbers and wondered where he'd be on the all time charts had he not enetered the service twice in his glorious career. We can figure he was a lot better than his cumulative numbers placed him.
We do it all the time. Maybe the casual fan does not, and there's nothing wrong with that, but maybe it's easier to look at HRs and OPS and PAs and try to figure it all out. We can look at career HR/PA, and stats like OPS are in some ways PA independent when sample sizes are large enough or somewhat similar when comparing a players full career vs another, but when there is a significant difference, one should weigh that value accordingly and depending on what sort of value yo want to determine.
A casual fan might look at Moreland's OPS this year and say he's having a great year. Most Sox fans know he killed us by being out so long, and that he mostly just a platoon player. His numbers vs LHPs and his proneness to injury was a major reason we signed Pearce instead of a RP'er, but I digress.
All stats and metrics are flawed.Nobody has said otherwise. WAR is for measuring something different from OPS or HRs or wRC+ of UZR/150. It tries to add a bunch of stuff together and say how mush value a player gave his team. Some of that value is from playing more than others or most players. Some is from doing great, sometimes in much fewer PAs or IP'd. It's not perfect, but neither is any other single stat or metric or something like OPS.