He is the most productive hitter in baseball this season, leading the majors with 38HR right now, won the MVP in 2021, and was 4th in Cy Young voting in 2022. Offensively from 2021 to 2023 he's 2nd in home runs with 118, he's 3rd in OPS, 16th in stolen bases, 21st in hits, 2nd in walks, T-1st in intentional walks, T-1st in triples, 6th in RBI, etc. Over the same timeframe as a pitcher he's 9th in the majors in ERA among qualified starters, 8th in strikeouts (3rd in K/9), 11th in FIP, 10th in fWAR, and 4th in rWAR.
He's an ace who's been a top 10 pitcher in baseball for 3 seasons and throws a 100mph fastball while also being a top 5 hitter in the world (and the single best hitter so far this season) and one of the fastest guys in the majors. There are a small handful of better pitchers and probably only Trout, Judge, and Alvarez are better at the plate right now. You're right that being versatile doesn't inherently mean dominant but when your versatility means your team gets the equivalent of two franchise players who would cost 30 million a year each in free agency that's absolutely dominance.
In terms of aggregate comparisons over the past three seasons he's been slightly more effective at the plate than Freddie Freeman ($27M/yr) and roughly as valuable as a pitcher as Gerrit Cole ($36M/yr) or Max Scherzer (43.33M/yr). It's genuinely ludicrous how good he is, he's performing on par with slam dunk HOFers on both sides of the ball at the same time.