Not all architects know. Source -- Am in month 21 of a construction project. Have caught more than a dozen mistakes made by both the architect and the GC's subcontractors.
But that's normal, there are varying degrees of competence in each trade. If someone asks who should they hire to develop a software solution, the answer is "a software company", even if there are software companies that develop awful software full of bugs.
You cannot state such things without specifying where you are. In some places (and/or industries or market segments, even), architects are 'just the design person', sometimes even not really doing technical design but just function and aesthetics. In others they are engineers who do (besides design) very hands-on oversight of all sorts of contractors.
ghouse|3 years ago
darkwater|3 years ago
hn_go_brrrrr|3 years ago
roel_v|3 years ago