I think you mean who in earth is working on Wave who doesn’t think to parse international standards correctly.
I’m personally glad they use a useful format rather tha than inventing their own one that will have to be manually parsed by any software written to interact with it tether than use proven and optimised libraries.
Anyone who’s ever even dipped into programming is aware how much of a fubar datetimes can be if not implemented by someone who knows what they are doing (i.e. a library author).
Trying to produce a custom regex to parse ankther format is a recipe for disaster.