either not a single second was spent on users abroad, or a deliberate decision was made to accommodate the American user base with what they are familiar.
I don't think you should assign malicious intentions to this so easily.
As far as I understand it, this site is the work of a single man, "All hail Tony", who is probably american. He most likely uses the AM_PM clock himself, so when he made the scheduling feature, it would have never occurred to him that he was making a mistake.
However, I must reiterate that the mistake that I see is that he was using a system that is prone to confusion, which is objectively worse in this scenario. It is not that he somehow disregarded me by not giving me the system I am accustomed to.
Would the website gain from being "international"? That depends on their strategy, but if they want to appeal to everyone, then yes, that would probably be better. So there is an argument to be made about using international standards everywhere, whether or not they provide specific benefits. However, not doing so does not equate to disregarding the foreign user base.
Tony does not have a team of dedicated subordinates who can plan out every small feature. He is one man, doing a remarkable but ultimately not flawless job.
We do not know him, we know his work. We can judge the features, saying "this is confusing", but we cannot judge his intentions, saying "he doesn't care about us".
