For fans, football is tribal, passion, life itself at times.
For managers, it is employment. They may love the club that employs them, may thump the badge on their coaching threads with sincerity after a win, may stay a while, and may come back to lifelong applause if they are a legend, but the rules of employment mean they will almost always take the opportunity and the money higher up if offered.
If Man United sacked Ten Haag and took De Zerbi from Brighton, Brighton took McKenna from Ipswich, Ipswich took Mousinho from Portsmouth, and Portsmouth took Williams from Notts County, would all of those managers on the move be dishonest, disloyal snakes who secretly hated the clubs they claimed to represent proudly, or would they simply be employees performing well enough to get head hunted for an even better opportunity?