When I talk "risk," it's mainly about the odds of playing vs missing time.
Of course, money is part of the risk, and that is one reason Buehler will only get 1-2 years and $13-20M per year vs other less upside pitchers who are more dependable, on paper.
I understand that signing Pivetta to $70M/3 or $84M/4 is a big risk, if he turns sour, but I'd still rather have him at that cost than Buehler at $17M/1 or $32M/2, certainly more than the suggested Gio contract offer to WB.
It's not a slam dunk choice, to me, but right now, I'm in the "I'm sick of signing oft-injured- once-great" pitchers. Maybe, over time, I'll ease up on my dislike for these signing.