Proportionately, howeve, it’s closer. A straight total will always favor RHH.
MLB has only about 35% LHH and 28% LHP.
So that list of 15 hitters has one lefty and 4 switch hitters. If you look at each switch hitter as .72 RHH, then it becomes 3.88 LHH, which makes for roughly 25%. So yeah, still low. Need 2 more switch hitters to make it right…