So my eyes are not as good as a LAME's eyes?
This has absolutely nothing to do with it.
It is about training and experience.
I was a fully Licenced LAME for some 40 years, Licenced Airframes and Engines on many Aircraft from F27s and Viscounts, DC9s, B727s, B737s, MD80s through to B767s and A300 and A310s, and have done quite a few preflights on all of those types.
However I was never Licenced on B747s for example, so there is NO WAY despite my decades of training and experience as a LAME that I would ever pretend that I could preflight a B747 properly, yet someone with little or no training thinks they can.
