Apparently, the suit helped to notice that he is no longer just a hopeful smart boy in jeans, but quite an adult smart and intelligent man.
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And I thought it should be noticed by the results of the work :)
At work, Timid goes in jeans and sweaters. For 40 years, he is very smart. His team deals with some of the most difficult tasks. veterans of the company. In sweaters and jeans. Comfortably so. And no one will be put in his place for his dress. Because the boss needs the result, not the costume.
Moreover, the director (including the general) only wears costumes for meetings with clients, speeches at conferences, presentations and similar events. They also go to work without costumes. And why? It is so comfortable :)