The defense usually has an option to insist that the jury is given no “lesser” options. It's sometimes done for tactical reasons in cases like this where there's a risk they'll convict an innocent man by settling on a compromise verdict.
No, for example the child abuse count was FS 827.03(2) aggravated child abuse. Everything charged required hands-on action by Casey and they did not have the supporting proof of Casey actually doing that. Had they stepped down to or simply included 827.03(1) Child Abuse or 827.03(3) Neglect of a Child, both third instead of first degree felonies, I am certain the jury would have grasped them with both hands.
For example, Neglect is defined as "A caregiver's failure or omission to provide a child with the care, supervision, and services necessary to maintain the child's physical and mental health...", a no-brainer, but that charge was not available to the jury!!!