Why do you think some people try to monopolize truth?
Monopolisation of anything only happens if others allow it to happen. More often that not the word ‘monopolisation’ is used when someone feels they have missed out on voicing their opinion or if the situation has not played into their hands.
If you have no opinion on which way to walk to school/drive to work/run the country then you give others who are willing to voice their opinions the power to make that decision. This does not mean their opinion is the truth only their interpretation of how to proceed.
If leaders didn’t monopolise their speeches where would we be? Probably still wearing our birthday suits and using a fig leaf as toilet paper.
Scrap the word ‘monopolisation’ and change it for ‘I have a voice and it will be heard’ then you can shape your decisions on how to proceed, if not sit back and watch others take action on their decisions and enjoy the spectacle.