I went through this all on Twitter so I am going to plagiarize myself.
No one is asking him to uppercut or become a power sell out, you just want him in the gaps. I will put it this way. His father never had a GB% > 55% and had a career rate of 49.1%, but a LD rate of 20.4%. If he hits GBs at a high rate his ceiling is very limited.
Right now he is at 62%, there are only 12 batters in the majors this season with a GB% > 55% and only James Wood has a wRC+ greater than 90
Overall in MLB this year:
GB: .246 AVG .024 ISO 41wRC+
FB: .217 AVG .428 ISO 125wRC+
LD: .698 AVG .202 ISO 356 wRC+
We have already baked in the he shouldn't be a slugger, but in the last 4 years there are 2 qualified seasons with a GB% > 60, Raimel Tapia 2021 (75 wRC+) and 2023 Tim Anderson (60 wRC+). Next on the list are 2022 (58.6%) and 2023 (57.3%) Christian Yelich who will occasionally have bonkers HR/FB ratios. He was a 110 and 122 wRC+ on those years, well down of 2018-2019 Yelich who ran 51.8% and 43.2% ground ball rates.
It really does not how fast you are, you are just losing the math race. If we just look at Reading this year, there are 17 hitters with at least 100 PAs and Crawford is 15th in ISO. He is 492 out of 492 in ground ball rate among all minor leaguers with at least 400 PAs. He is at the absolute bottom of the metric. To put it in another sport, hitting ground balls is taking mid range twos in basketball, you can do it and in many circumstances they can be positive, but if everyone else is hitting threes, making layups and dunks, and getting free throws you just are not going to win in the long run.