Fair point, but I have a counterpoint. The dunning krueger effect means most "widely specialized" people assume their competence is leagues higher than it actually is in fields they have marginal understanding of. This leads to people overestimating their abilities and fucking things up, when they really should rely on 0.1% experts. This of course isn't true for simple things like cooking, knot tying and email writing, but the more technical a task, the greater the threat of overestimated competence vs known incompetence.