In fairness, 'opinion' is a horrendously vague and ill-defined word. It does double duty as (i) 'normative value' and (ii) 'personal understanding of the descriptive facts', which two senses are constantly confused - for example right here.

That's why we constantly get "it's just my opinion" used in reference to type-ii opinions (personal understanding of descriptive fact), when it's only really appropriate to type-i opinions (normative value).

Many conversations would be far clearer if it were abandoned in favour of more precise language, IMPUOTDF.

"Many conversations would be far clearer if it were abandoned in favour of more precise language, IMPUOTDF"... um whats IMPUOTDF? I did try to google it, but only this post was found.

Sorry, I was joking: 'in my personal understanding of the descriptive facts', referring back to that second definition of 'opinion' earlier in the comment.