Quote 1
"[Zoë] came early. You can't know what's going to happen before it happens."
"Yes I can," Denny said, "If I am any good, I can." (6.34-5)
If you think this is a little Yoda-trippy, that's because it is. Denny is trying to apply the rules by which he lives his racing career to his life, which is all very well and good when it makes him a prepared, focused person, but not good when he beats himself up for missing his daughter's birth or feels responsible for his wife's death. There are some things we can't control, Denny. Like whether they'll ever make a live-action reboot of The Lion King.
Quote 2
"No one could force Eve to do anything Eve didn't want to do," Denny said. "I certainly couldn't." (29.104)
This interaction that Denny has with Maxwell and Trish after Eve's death shows that Eve has always been in charge of making her own decisions, especially those decisions related to her health. We see her time and again realizing that something's wrong with her but refusing to seek help. This decision was a way for her to take control of her life, even if that decision leads to her death.
Quote 3
"Until what?" Denny demanded. I could hear the irritation in his voice. "How do you know what's going to happen? You're condemning her to something before you even know."
[…]
"Please, Denny. We have to face the reality of it. The doctor said six to eight months. He was quite definite." (23.38-40)
This interaction shows Trish and Maxwell's opinion of Eve's diagnosis, as opposed to Denny's. Denny, who doesn't give up for anything, isn't willing to sell Eve out to her diagnosis, while Maxwell and Trish are preparing for the reality of it.