Everybody should have their own opinion and should be allowed to vocalise it. Just because somebody is in the public eye (celebrities) does not mean they are necessarily experts, intelligent, insightful, or should be a leader of thought. It baffles me why so many people are bothered what celebrities think or say- most often a celebrity skill set is very narrow - can they play a game well; can they sing a bland pop song with the aid if autotune while wobbling their breast in a skimpy outfit; can the remember a few lines of dialogue and play pretend in front of a camera - I'd really rather our top scientists, philosophers and surgeons were given this cult following.
Equally in my non-expert opinion I might disagree with them and their views. Does it affect how well they can boot a football? No. Does it affect whether I like or respect them? Maybe. Does my liking or respecting them have any influence on whether they should play for the club I follow? No.
So long as they don't break the law of the land laid down by our elected representatives* I don't give a flying fig of celebrity opinion.
*theoretical obviously- as if they ever represent the electorate for a microsecond ffs!