I think it is important to appreciate the great work of all manufacturers of lenses.
I think it is very easy to be very critical about lenses and 'over-analyze' stuff but IMHO the optics have come a long way .. and today I believe that there are no really bad lenses anymore. Even the 'kit lenses' today do a really great job.
And I am happy that this technology enables me to take great pictures. And that is of course what it's all about.