One of those rare moments in history where part of the diaspora clientele is more worried by their relative than internet strangers.
Its human nature to get corrupted with power. Do not give the person too much authority and trust as they will be tempted to misuse it.
During beam design or any other structural member using structural engineering softwares, civil/structural engineers normally do preliminary sizing manually then check its adequacy in software, sometimes the size might pass or fail, in the event it fails same of this design softwares the likes of RSA, Etabs etc the are high performance softwares that has the capability to provide adequate size, reinforcement and even draft a drawing according to code compliance, but in some situations, it may turn out the size is not economical yet it is satisfactory, now this the point where structural engineers brings in their expertise, to ensure it is economical.