If he hadn't been willing to use the Phoenix Force, then he would have, at the very least, tried to break away from it at some point of the story - even if it was deemed to fail because of the plot making Hope the only person on Earth effectively capable of breaking away from the PF.
But in the same time, Summers expressedly said she was free to walk away out of Utopia if she ever felt like it.
My question is then:
Does it sound like to you someone willing to prepare her for bearing the mantle?
The fact that she was showed hanging around in Utopia doing NOTHING while being there further this impression.
Or am I suppose to believe her doing someone's hair while Scott read a book in another room is part of her "determined" preparation by the P5? (sic)
Eff to that.
It just shows how dedicated Summers and the other P5 were willing to prepare her, in order to give her the PF back : not so much.
This reasoning is a dead-end.
I mean, if Summers was believing Hope and the Phoenix Force were destined to each other, how could he have possibly thought that anyone else was suited to wield the Phoenix Force other than Hope?
It's the basest logic here.
But it's a bit far-fetched to consider "cold, hard facts" arguments crumbling onto themselves when one's taking the time to discuss them a little.