But you don't give credit for Darvish in Japan and all the years of durability. This is must a meaningless point on your part. Maybe Lester is SLIGHTLY more durable than Darvish. But Darvish is clearly durable and you are misleading people if you say he is not.
On Lester you also cherry-pick WAR: 6.1, 6.3, 5.2, 4.4, 0.7, 3.0, 4.6 is his 7 year sequence.
Darvish on a 7-year sequence is x.x, x.x, 3.9, 5.8, 3.2 (4.7 pro-rated), 2.5 (4.7 pro-rated), 3.3 (3.7 maybe pro-rated to about 30 starts)
In the 2 x.x years early on you have Lester at age 24 and 25 and no reference for Darvish in 2 seasons where he had 1.78 and 1.44 ERAs in Japan. Which could have been as good as Lester.
So let's look at the 5 years pre-free agency with pro-rating (which admittedly helps Darvish):
Lester: 5,2, 4,4, 0.7, 3.0, 4.6 = 17.9 (3.6 average)
Darvish: 3.9, 5.8, 4.7, 4.7, 3.7 = 22.8 (4.6 average)
even without the pro-rating Darvish has 18.7 WAR in the 5 years versus 17.9 for Lester.
So when you say Lester is better, you are just wrong.
And BTW NOBODY even claimed Lester is better. You claimed the Cubs did not sign any big free agents before their breakout year as an excuse to say the Phillies should not either. And you are wrong on that point too.
Both pitchers are durable. Both pitchers are good. Anything else is splitting hairs and avoiding the whole topic of discussion which is whether the Phillies should use their money to sign a good pitcher. I think they should. You think they shouldn't. Darvish will be expensive and risky. I know that. But he is also good and durable. The whole world except you seems to know that part.