I would never criticize anyone for their gear decisions, but many, many photogs use "other" cheaper gear and get the results they're after. It's a cost-benefit analysis that everyone has to do for themselves. You chose one way, I chose another. Don't look down on me for that or accuse me of being too amateur. (I know you probably didn't mean it that way.)
Hey, I totally respect you and you might be surprised to find that I actually agree with you too! I own and use a pair of Yongnuo YN560 manual flashes. They do everything I want them to do, reliably and at a ridiculously low price when I don't need TTL. I am definitely not knocking the Yongnuo gear as I use their products frequently myself!
I'm not criticizing amateur photographers at all. As a matter of fact, being an amateur is awesome and FUN! You have the freedom to shoot what you want, when you want. Cheap 3rd party brands are PERFECT for that, and I'd actually argue that it would be stupid to spend more money on extra features that you don't need and won't get you different results than pro gear would.
The only reason I bring up the argument for
the Canon gear in this thread is because the OP mentioned he is a wedding shooter. Wedding photographers use their gear every weekend and work it hard. For us, it is actually worth it to spend extra money on reliability -- that peace of mind knowing that our gear is X% less likely to fail has real value to us. Why? Because so many things can go wrong during a wedding, and if you aren't prepared you will fail at the job which you are being paid to do. At best, you will embarrass yourself because you couldn't get your gear working properly in front of the client and you will look unprofessional. At worst, you will ruin the most important day of someones life and possibly lose your business, money, home, etc.
Pro-level gear isn't a requirement to taking great photographs, it just makes it easier! And when you are getting paid to do a job, you want your job to be easier, even if it means spending a little extra on your gear.
That said, keep rocking your Yongnuos, because I know they can and have been used to create photographs that are better than anything I will ever produce