What's the logic behind the word 从事? Usually Chinese words are not made up of random characters, but instead have some kind of underlying logic.  Moreover, understanding this logic makes it easier to remember and use the word.  However, one common-ish (HSK5-level) word causes me issues:

从事 (cóng​shì)
CC-CEDICT: to go for / to engage in / to undertake / to deal with / to handle / to do

So it's yet another way of saying &quot;do&quot; (I'll add it to the list: 做, 干, 搞, 弄, etc.) but it's perhaps more formal and encountered in a business/workplace setting.
It literally translates to something like &quot;from matter/affair&quot;, which seems detached from &quot;to do&quot;:

从 (cóng​)
CC-CEDICT: from / through / via / to follow / to obey / to engage in (an activity) / never (in negative sentence) / (Taiwan pr. [zong4]) retainer / assistant / auxiliary / subordinate / related by common paternal grandfather or earlier ancestor
事 (shì)
CC-CEDICT: matter / thing / item / work / affair

I don't get the logic here, and why this word is even needed.
Question: What's the logic behind the word 从事?
事 can also be a verb  for 'to serve; to work for' e.g. 忠臣不事二主 (a loyal vassal does not serve/ work for two masters)
Since 从 itself has many different meanings, just say 从 is not specific enough. Adding a similar verb 事 and form the compound word 从事 make it a specific term for 'to engage in' (a field/ industry)
从政 = to undertake a political career
从商 = to engage in the business world
从影 = to work in the films industry (refers to the on-screen personnel only )
从軍 = to join/ to serve the military

从 - engage; join


事 - serve; work for


从事 = to engage in (a field/ industry)

Example:
从事环保工作 - Engage in environmental protection work
从事出入口行业 - Engage in the import and export industry