I provide a service. For money. It’s a business.
My service, my product, meets the need of the consumer, aka the student. If nobody tells my students that I’m not American then they are usually very surprised when I tell them the truth. In other words, the consumer is not capable of differentiating, doesn’t usually care, and therefore the requirement is meaningless. From a business perspective, the school is preventing itself from buying a product that meets their need - and thus hurting my business - through the mistaken belief that this is actually a requirement of their customers, the end-consumers.
Very few students state a requirement for a particular accent, and given that only 1/3 of students going overseas are headed for North America I’m not particularly disadvantaged when they do. The vast majority just want a competent teacher and, while I might disagree with many of them about what constitutes a competent teacher, accent is not usually the issue.
This is simply a case of a “school” putting uninformed prejudice before good business sense, not to mention that as a “school” they should know that accent is not really relevant. This is odd, because the same school expressed a desire to interview me when I first came to Taiwan. Presumably the ad doesn’t even reflect company policy, they just happen to have hired a twat to write their ads for them and he/she is now hurting their business.
I know Americans who teach IELTS prep classes. I don’t complain about being asked to use American books with my junior high kids and nobody complains that anybody doesn’t have the right accent. Nobody cares about such trivia in the classroom, because the business of the day is teaching people how the language works and despite the hullabullah (or however you spell it) the differences between real English and that bastardised simplified shit you speak are really so small as to be inconsequential. These are people who can’t remember to use the past tense when describing past events in a class devoted to writing about past events in the past tense. I’m pretty sure we all do that the same way, wherever in the English-speaking world we come from.
(NB: TLI is known as an adult school and the ad specifies teaching adults and school-age students, not kindy. We’re not talking about teaching kids how to pronounce apple correctly. They’re beyond that and I’ve never had an adult class where correct pronunciation was an issue.)