I would disagree on this - a career field can be innocent or bloodless and often is, since many occupations do not provide opportunities for illegal or abusive activity or for intentional killing people. For example, airline dispatchers,, not to be confused with air traffic controllers (another honorable profession) who plan and monitor the flights for airlines based in North America and a few other continents (surprisingly, many European airlines historically did not have dispatchers and instead burdened pilots with much of their work), responding to problems that might arise en route, for example, making arrangement if the pilots have to divert from their destination for any reason (such as mechanical problems, or weather, or problems at the destination airport ranging from congestion to a violent incident of terrorism requiring the airport close for investigation and repair). On September 11th, 2001, dispatchers helped the FAA close the national airspace quickly and efficiently, and indeed to a large extent pre-empted that closure, since before the airspace was closed, dispatchers for American, United, TWA (at the time recently acquired by American and in the process of being merged into AA) and a few other airlines had already ordered their aircraft to return to their hubs or departure cities immediately.
Conversely, the early church, based on Scriptural guidance, identified some professions which at the time were regarded as inherently dishonorable, and participants in these professions were required to make a career change before being received into the church.
These professions included actors, gladiators and trainers of gladiators, \ school teachers and prostitutes. Since that time, the theatre has become less lewd and more respectable (mainly within the past 500 years in the West) and as a result the field of acting is no longer regarded by the hierarchs of the same churches that adhered to these canons as being problematic, and those churches themselves would train school teachers, initially largely from the monastic communities in the West, less so in the East, to replace the Pagan school teachers (the specific issue was with Roman Rhaetors and Grammatici and their Greek equivalent, which provided an education rooted in Pagan religion and philosophy, which itself even in the case of Socrates, Plato and Aristotle involved some element of Hellenic religion, and in other cases, for example, Pythagoras, he was the center of an ancient cult which was distinct from mainstream Paganism and which some theorize was also the religion of the Druids (and which some people believe survives in the secretive Druze religion practiced in Lebanon and Israel (I say israeli and not Palestine, because there are many Druze who are Israeli citizens and who serve in senior roles in the Israeli military, likely due to a resentment of the persecution of their people by Muslims, which was negated somewhat by their following a strategy much like that which kept the Maronite Catholics safe for many centuries, that being of establishing forts in the mountainous areas of Lebanon, which put them in a better defensive position than the Christiand and Yazidis of the Nineveh Plains in Iraq, for example).
