Let's not get too ahead of ourselves here.
Some similarities there? Sure.
But huge gaps in hard hit rate leading to large gaps in xBA and xSLG as starting off points in an MLB career isn't a good comparison of players. Again, a lot of Rocchio's xwOBA, which I am sure is a major reason why this rando is making this comparison in the first place, is because he has a near 5% advantage in BB rate and a near 2% in K rate, not because he is hitting the ball similar to Masyn Wynn. And Rocchio's BB rate is not sustainable, why it's already been cut in half and down to 5.9% in June. But an xwOBA based on quality of contact of .351 for Wynn and .305 for Rocchio is yet another massive gap.
That is the major reason why one guy is performing more than the other right now at the plate. A near 7% gap in hard hit rate leading to better quality of contact more frequently is going to always win out over a large sample size of balls put in play.
If you are looking for a good sign though, he's currently riding his first month with a hard hit rate over 30% in his MLB career. And it's not surprising he's having his best output month offensively in the MLB to this point in his career at the same time, even with his BB rate way down.
Hitting the ball hard matters. Don't care what any slapdick here says. It's mattered since this game was created almost 200 years ago. If he does it more his numbers will get better because he is good at putting the ball in play and he's good at putting it in play the right way (LA sweet spot). Only thing that isn't there is the umph he needs to turn those balls in play into hits against MLB defenses with more frequency.
He doesn't hit the ball hard with any frequency and we're just going to see more of the same .570 to .620 OPS fluctuations we've been seeing for 2 consecutive months now with no real improvement imminent. Has always been the thing that needs to change for him if he wants to be successful and it still is.