Important is pronounced not with two hard t sounds, but with a glottal stop: Impor[glottal stop]ant. That's not laziness, that's my actual dialect of English spoken by actual adult people.
I full appreciate that there are differences across the globe, but I'm with the parent on this one - I've always said it with two hard t's my whole life, as do most other people here in Australia. I would be asking chatGPT to fix her/his pronunciation during a conversation.
I agree with others here too. At the moment the voice sounds like "grinning barbie" from the end of Toy Story 2. Just stop smiling constantly and talk like a real person chatGPT!
