In an ideal world theyd all have the same training level to start with but unfortunately they dont and arent required to have a nationaly recognised certificate.
I use a 6910 here at the telco I work at and agree that my coffee made on it is superior to anything within cooee.
IMO the general public dont know what a good coffee is.
Therein lies your problem.
(Im not working as a barista, but have, and my barista certification is not nationally recognised.)
P.S. I have 2 trees.