It is more about continued growth between a daughter and father. Coaching them when they are young, birth through 12 is most opportune for a dad to really connect with his player. Have common ground to bond.
After 12, the father should consider what aspects of your daughter do you want to be involved. Softball ends much quicker than you may think. If softball is the only thing that bonds each together, what happens then? Teenagers is defined as such through history for a reason.
My player is in college, and still playing softball. Our conversations are about any and everything BUT softball.
When to let go is a risk, always is. The player will let you know, listen to her. There can be greater opportunities for a good player to move away from dad. But also some hard knocks which dad cannot protect her from.
I have seen it work well both ways. Most players move away from dad, and listen to me dads, it is up to you to find common ground, trust, backing, without softball.
It also should be understood. There are coaches, who made their way starting with their daughters. It is a select group. The insiders know. For them it has worked, and probably in the process faced more criticism than deserved. For that value extends to others, so I also support those few.
South Carolina is based on the softball daughter/dad (pardon, and Mom's) relationship. It is what makes this state so great. For such a small state, plenty of great players emerge. There are no easy answers, but to just ask, represents why we in SC are so proud of our young lady players and their parents.
Just keep the daughters on the field. There are plenty fields. Coaching Matters a bunch. Then It becomes up to the player, her mind, her skill set, her body. The daughter and player determines the end game and is most difficult for any parent to grasp.