Are opinions pointless?

opinions are something someone feels is right and there are many opinions in the world to oppose this opinion and all other opinions im sure. and trying to change someone else's opinion's to fit yours is nearly impossible, because they think that is right. but if its not right you can try to explain it and ofcourse they have an explanation to argue your opinion without even trying to comprehend yours. then it all turns into a swirling arguement of nothing. then you feel exhausted and you give up on trying to enlighten the person because its all going no where fast. and inside your head your completely ignoring the persons opposing beliefs because you know your right and in turn they are completely ignoring your beliefs because they know their right. and there is just a big bitterness in between the two of you. and only damage has been done on both parts and nothing has been resolved. so i ask you are opinions pointless? and if not is there a way to get along with opposing opinions?