The fact that this page exists feel like they're having a lot of creaking/rattling complaints. Why else have it.

I've driven the Ioniq 5 and I can easily hear a high pitched motor whine at speeds between 45 and 60 mph. I cannot hear any noise below 45 or above 60, other than the intentional pedestrian warning sound.

I suspect as I age my ability to hear such high pitched whine will be gone.

Motor whine isn't a weird sound and it's unsurprising Hyundai doesn't have an FAQ page to explain it.

I suspect many of these noises are due to Tesla's notoriously poor build quality.

I agree it isn't weird but it bothers me much more than the engine noise of an ICE car.

It would highly depend on the brand and model: one would expect Rolls-Royce EVs or even some like Lexus not to make any annoying noises.

Wouldn't one also expect that of Teslas, which are as expensive or more expensive than EVs made by legacy luxury brands like Lexus?

Tesla is new and mostly for tech-oriented people, the expectations are new and more techy things are ok. Legacy brands have expectations set in peoples' minds, so they have to keep up with their history.