That’s not an accurate description of the case you linked. No reason was given for the denial. The subject of the story was asked about work by the immigration

That’s not an accurate description of the case you linked. No reason was given for the denial. The subject of the story was asked about work by the immigration officers but nothing indicates that he was removed from the country because of work. He seems to have been removed because they wanted to remove him, not because of innocent confusion about his visa.