I think main reason for people who doesnt understand the reason of quality of Leica , is glass light spectrum transmittance ability of these lenses. I downloaded all the Leica patents , found the glass name with abbe and ref index and look to their spectrum ranges.
Leica glass especially Fluoride ones out performs the Canon BK7 Borax glass , 4 times wider range.
If we apply a analogy , if your oppenents playing ground 4 times larger at American Football , you can reach your target more easier.
Leica invests hundred times more expensive glasses and to make a better lens than canon is not harder but easier. Thats why , you will nver be able to buy better lens and cheaper price with Leica.