I am an amatuer locksmith, and I can open Masterlock No. 3 or No. 5 (which are used everywhere) incredibly quickly (less than 10 seconds, typically [especially on No. 5, which are horrible).
A half diamond pick and a torsion wrench are tiny, I can keep them in my pocket and nobody will ever notice... I can't do this with a huge bolt cutter.
Now, do I steal things? Absolutely not. Has getting into picking caused me to be much much more careful about what I lock up, where, and with what? definitely.
I'm all for locksports, I think the fact that people are getting into picking is awesome, but the idea that using a bolt cutter against a padlock is faster and more conveinient than using a pick is just plain wrong.