Maturity is realizing how many things don’t require your opinion.
In my experience, nothing is gained from giving people your opinion, unless of course, they ask for that opinion directly.
People form their own opinions based on their experiences, their own perception, and the information they have acquired. They will not change their opinions based on the opinions of others, especially when they didn’t ask for it.
It is not necessary to give your opinion just because you have one or because you think yours is right. Opinions aren’t right or wrong.