I'd say 99% of electricians don't back-plug. The other 1% are in tight competitive markets and are hoping the connections last the mandatory one-year warranty. Then it's a service call. I worked for an outfit once that gave me that very excuse, almost verbatim. I didn't work for them long.
Loose wires cause fires...
However, back wired receptacles are OK (and preferred by some) which differ by having the screw tighten the clamp rather than a spring. These are common in GFCI receptacles.
