It is correctly criticized, those who buy/learn(?) a trick one day and then perform it the next.
Most well-performed effects take a good deal of practice, and trial and error,(guess what an error doing this will buy you)and yet this is something to "go in" the act, in 6 weeks?
A escape/lock consultant told me, too often the first time he has seen an "escape artist" perform a milk can or torture cell, for the first time, filled with water, was also the first time they performed it, in front of a real audience!
(No wonder the body count, for escape and other death-flirting stunts, keeps rising.)
A lot of catalog magic, is supposed to be "safe" and "foolproof", and yet with only a few weeks work, the results would not be recommended...and yet a bullet catch is to be hurried upon, (with a "sure fire" method!) at the bequest of a CEO?
(Yes, the premise/persona of the performers is a big factor, but are those in YOUR audience who might not like to see guns, much less fired at someone?!)
Only you can answer these questions for yourself. I hope you have the right answers.