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Nobody says it anymore
(startrek.website)
I've heard it explained that "hey" used to be more of an urgent way to get someone's attention, rather than a casual "hello" like it is now, so it sounded rude to some older folks.
If someone says you’re welcome, you know they are a corporate drone and management wants them to say that to avoid certain people making a scene. Why’s it insincere to say no problem? In the same vein, they only said you’re welcome because they are complying too.
There’s no issues with saying no problem unless you want there to be. Those are cool workplaces.