I personally don't oppose these predictions, as analysts base them on data, however as we know no prediction is accurate. It's better to teach them how to consistently invest without being lured by the promise of fantastic price increases in the future. Bitcoin will certainly reach that point sooner or later. We just have to wait patiently.
What data? As I see it, people who make predictions for the next 5 or 10 years and predictions like $500,000, $1 million or more. They hardly provide any analysis or data to make their predictions credible. They seem to just make predictions randomly and with the intention of attracting the attention of the crowd instead of making predictions they believe will happen.
Or they have other purpose like you said, they want more newbies to enter the market, more Fomo in the market to push the price of bitcoin as high as possible and they can close the profit with better profit.
Everyone has the right to make any prediction because it is everyone's right but honestly, I don't like these kind of predictions because it will harm the newbies.