Trouble with Impositions The key thing is the well-being of the person, not the degree of control exercised by two people. Other people are also responsible for the happiness of individuals.
The amount of influence one has might depend on the level of involvement of the parent. The more they are there to help their children and give them the right skills/values, the more probable it gets that they would live a better life or at least not find it impossible to face difficult situations.
Even seemingly terrible parents can create children who would have good lives. However, it wouldn't seem reasonable to suggest that we should ignore their intentions altogether. In addition, one should not be compelled to have perfect control over one's life. This could only be applicable if the person in question was unable to take care of itself for eternity or the parents were somehow responsible for placing the person in a worse, less free state than it previously was in—which obviously doesn't apply to non-existent beings. And if one is responsible for all the harms that happen in a person's life, they also deserve praise for all the good that happens.
Certainly, one should not forget about the negative consequences that could occur. Although, I would still say that the actions of other individuals are also pertinent, since ascribing responsibility should be done in a reasonable way that takes into account all the diverse factors in a person's life. Still, if creation has value, it can obviously be negative, whether or not the parents intended it to be. I do not think that the possibility of a negative outcome should be dismissed. Rather, one should act depending upon their circumstances whilst keeping in the mind the reality of happiness along with the risk of suffering.