No, he is actually a well rounded hitter, it is 2021.
Gallo's OPS is .869, he gets on base very well with a lot of walks, his OBP is .379 which is outstanding for a power hitting outfielder. Slugging is .490.
RC/27 is a strong 6.9.
In the year 2021, and it is not about batting average, or even strikeouts, it is on base plus slugging, OPS is a good measure, there are others.
AND he is a true plus fielder, outfield defense matters, he was a Gold Glover, can play all three outfield positions.
Yanks needed a LH hitter that can bat 2-3-4-5 in the lineup, he is perfect.
Great move for them, (I am NOT a Yankee fan, just a baseball fan).
(ALL baseball is suffering from the launch angle go for home run approach, the three outcomes strikeout, walk, homers are bad for the game. High hard fastball is resulting in more strikeouts, hitters upper cutting have problems hitting the high hard pitch. Batters are encouraged to take a lot of pitches against good starters to get the pitch count up and get them out of the game. Pens are filled with several big dummies that can throw 97mph so relief pitchers are used too often)