The warranty info on these axles seem to indicate it's void if the boots are torn?
A "Damaged boot" voids the warranty. Like, if you tear the boot on a branch or a root or rock, that's not a defect. They are warrantying the original product from defects. Damage to the boot isn't a defect. A Failed boot due to a defect is another story. That's how I'm reading it.
Does anyone warranty the boots themselves on any CV Axles for the life of a vehicle?
Where specifically are you finding that? I'm not seeing that anywhere on the oreilly's warranty information.
"1.4) NOT COVERED BY LIMITED WARRANTY
This limited warranty does not extend to any product that fails due to:
(i) Accident or collision
(ii) Improper use, installation, maintenance, or service
(iii) Use of the product with other third-party product(s) which fail
(iv) Abuse, misuse, modification, or neglect of the product
(v) Failure to follow directions on proper use or installation
(vi) Flood, chemical fallout, salt, hail, or other environment conditions including natural disasters
(vii) Installation or use on vehicles used for powersports, off-road, or racing purposes where such product is not intended for these applications
(viii) Installation or use on vehicles used for marine purposes where such product is not intended for marine use"