The Baidu CEO clearly has a point. Nowadays, virtually every company somehow manages to put an "AI"-tag onto their products, services or their infrastructure - but not because of a significant part of them was related to AI but just because "AI" has become a fancy word that everyone and their cat seems to expect. Insofer, yes, it is a bubble right now.
On the other hand: the development of AI is virtually exponential, no other technonolgy with disruptive potential has ever shown such a fast and steep progression as has AI within the past few years.
So, as "unfit" current LLMs still seem to be in order to replace real human workforce, they are improving much faster than anything else has in history. So, either, AI hits a roadblock and cannot really take certain hurdles, or it will be able to replace human workforce much faster than these 10-30 years that the Baidu-CEO predicted.
And one more point: Since only few people on this planet really fully understand how AI works deep inside, there is a potential risk that such a technology that has the potenial to surpass the capabilities of human mind, might eventually become capable of harming humans.