I have witnessed a celebrity manipulating her fan until doing the craziest thing. Don't underestimate the support of a fan towards their celebrity, especially when the can is ignorant and not learned.
If you don't believe that celebrity has influence on their fan then companies won't be employing them for ads and some celebrities has caused brands to lose sale.
But like you said burnaboy has the right to his own believe and right to air his own believe, he did not commit any crime.
I'm not saying celebrities don't have influence on their fans, sure they do but let me tell you something, there's only an extent that celebrities can influence their fans, even if there are people who are actually stupid enough to blindly follow their celebrities off the cliff, there aren't so many that'll put their celebrities ahead of their own personal welfare or survival. For example, let's say you've been benefiting from crypto for several years now and then all of a sudden, a celebrity you love so much comes up one day and condemns the same crypto that's your source of livelihood simply because of his own opinion which you know isn't really true but a complete misconceptions, are you saying that majority in this case would discard and denounce their crypto involvement simply because their celebrity thinks it's bad? I think not.