The facts remain that for the last four years at least all airlines have been introducing procedures reducing the number of LAMES required prior to dispatch and pushback. There is as we all know is balanced by the risk of incident. We have now seen an occurence that may or may not be predicated on the reduced number of LAMES present on the tarmac.
Having said all that how anyone let alone a LAME could see corrosion of an axle contained within the nosewheel assembly is indeterminate(unless ofcourse you have x-ray vision).
Lets face it accidents sometimes happen, but sometimes the latent failures sit there and remain latent and only the most rigid of systems can combat this.