I am an Arthur fan, and I take the responsibility to answer your question.
Australia is a proud sports nation, probably the greatest sporting country in terms of population ratio. Almost every major spectator games to medal sports, they are among the very best. Soccer is probably their weakest link (among major games), still they are smoking past total Asia to qualify for every WC and has won Asia Cup in their 2nd attempt. A nation that's arrogant for their achievements (not only in sports, they are among the top 10 defense forces as well, one of the strongest economy also), and take lots of pride in their possession. Take any major sports - Soccer, Cricket, Field Hockey, Basketball, Rugby .... to individual sports like Golf, Tennis, Squash ... to Medal events - from Herb Elliot to Kathy Freeman, from Kiren Perkins to Ian Thorpe, from Dawn Fraser to Libbey Trickett ... even in a English game like Snooker, they have Neil Robertson. I grew up as a kid in AUS and I know how much the Aussies put their pride on their sports possession, almost jingoistic madness.
Now, in their 150 years of history, to my memory Aussies had never, never appointed a foreigner as their Head Coach of Cricket, Hockey, Rugby teams, neither for their wonderful academies which has produced some of the greatest in history - from Heb Elliot to Rod Laver to Greg Norman to Grant Hackett or Lissel Jones..... and Aussies do take lots of pride in their sports heritage - they didn't copy paste British mantra, rather like Yanks, have developed their own sports tradition, has own sports - Aussie rules. In that country, Mickey Arthur was the FIRST non Aussie to take charge of their pride possession - Head Coach of the Baggie Green holders. It's like a French, German, English or Italian taking charge of any other 3 Countries of the 4 .... or a Argentine, Uruguayan taking charge of the Selecao ..... almost blasphemous.
In that context, still Micky Arthur could crack the job, which suggests he had enough in his resume, his interview pitch was impressive enough and his technical knowledge was adequate for CA to break a 150 years of tradition, over several top domestic applicants. He couldn't keep the job for his personality traits, which we have seen is his PAK tenure as well - too stubborn to adjust, to rigid to accept change, to arrogant to learn from mistakes. But, technically, guy is among the best available in the business, which was enough to impress the CA - we might think it otherwise here in PP, but CA does know what they are doing and what they want.
Mickey Arthur has created an alarming trend for him - he starts with a bang for his technical knowledge, but goofs-up within few years for his lack of soft skills. In corporate culture, such people often work as Project Manager on short term basis and changes office in every 1-2 years. In last 20 months, from his peak of CT win, the way fortune has turned for PCT that it's only for a classless board like PCB that Arthur has kept his job, other wise for any other major Board, he would have been sacked after Asia Cup. But, for his support, I can say that in any other Board, no one would have got a esteemed position after calling National Coach a donkey in public, so it's on even keel - Mickey is matching his employers.
Arthur should change his career track and instead of managing National teams, he should look for more development jobs like technical coach or project directors (in cricket operation). Once Arthur leaves PCB, to my little capacity, I'll definitely refer him for role like a Director Cricket Development, or Director National Cricket Academy for BCB - but never for even a FC team or BPL team as Head Coach. In corporate world, he is a Finance guy, a CFA - knows the technicalities of his function, very good at working in silo with a small team, crunching numbers in his own way and keeping cards close to chest; but National team coaching is more of a Marketing job - more implementation tactics than strategy, resource management, being extrovert, visionary, expressive, flexible and open to ideas.