Opinions are subjective, and as such are limited in their optionality by the number of people whose reality overlaps with ours. Beyond a certain threshold the very cognitive foundation that our opinion is built on is eroded, and our opinions retract back to the world inside our head.
What that means in every day life is that making objective arguments is likely get more traction, with more people.
When it comes to measured things (time, money) this is easy. Graphs are in essence a common language, a joint harbor for both our realities to dock on to.
This is supposedly impossible for qualitative metrics (opinions, intuition, ethnography, which–man–is–bigger type situations), but there are in fact very useful techniques in the world of modeling, risk analysis and decision making under ambiguity which could set metrics of quantitive phenomenon.
p.s. if of interest I recommend (1) The End of Average (2) Model Thinking and (3) How to Measure Everything
p.p.s happy to chat to help and navigate this