I'm not trying to "flame" anyone, or to get flamed. (obviously)
I have just been getting many updates about the absolute horrors of separating these axles in place, etc.
My drivers side had ripped some time earlier and the grease was basically gone, so replacement was a must. I did the passenger side at the same time even though the boot had just ripped.
The axles I bought at Oreillys were re-manufactured units which doesn't guarantee that they are OEM or cheap Chinese knock-offs, but does mean they've been rebuilt to a standard.
The outer nut is not terribly difficult with an Air impact and a little bending back of the crushed edges. After partially releasing the knuckle or "upright" you only have to drive the axle back out of the drive flange. this is done with an axle removal tool, also straightforward.
The new "reman" unit is complete with the inner joint, so the only thing left to do is knock the whole axle out of the front diff and reverse the process.

I've done maybe 8 CV axles over the years on various vehicles and I've never had a bad replacement unit, so I think that risk is a non-issue.

I'm only trying to be helpful