True. Sometimes it takes more than one random person on the internet to convince you but they might be part of starting a thought process.

Evidence shows that arguments are really only conducive to changing opinions when the person has a set of primers to find the person they disagree with otherwise agreeable. They refer to it as being in alignment with socio-epistemic conditions. Basically, people within a group identity can change opinions with others in the group, as long as the difference in opinion is not one that would be diametrically opposed to their group's underlying identity. So, arguments between people from two different groups, like left v right, don't really change minds towards the group they do not identify with. Those watching the debate will agree with the people who are in the same socio-epistemic group. This arguably makes public debate a bad thing. This is because those third party on-lookers will side with the person in the debate they most identify with for reasons outside of the debate. So you are simply platforming the person you disagree with, and possibly exposing people more in alignment with them, to an argument for a more extreme version of their position, rather than exposing them to a counter-opinion argument, to be considered.

Here is a good starting point on this subject, it links to a number of supporting papers early in the paper.

https://academic.oup.com/aristotelian/article/123/2/173/7207975