In fact, there is no particular need to convince those who have already formed their opinion about bitcoin, it is just a waste of time at the current stage. There are a huge number of people who still do not have enough knowledge about bitcoin, and they are the ones who need to be told about it in the first place. Moreover, to to be told truthfully, with all the pros and cons, so that they eventually get the right idea about bitcoin, and so that they do not lose due to lack of awareness. And then, with the growing number of those who will benefit from the use of bitcoin, even those who now have a negative attitude towards it, doubts will begin to creep in, and they will also reconsider their attitude over time.
I totally agree with you, there is nothing useful in trying to convince people who have a negative fixed idea about Bitcoin.
Back in time, there have been people opposed to the electrification of cities and villages, there have been people opposed to smartphones, social networks too. There are those who are opposed to Bitcoin and cryptos more generally.
Even with global adoption, there will always be a portion of people who are against Bitcoin.
It's not this category of people that it's useful to debate Bitcoin with, personally I think we're past the point where Bitcoin has a bad image. Drugs and guns have transferred to the environmental problems of mining. Once this is no longer the case, even for the detractors, there will be something else to blame on Bitcoin.
Who cares, it has never prevented or blocked the development of BTC, the share of humans who don't know about Bitcoin but are not opposed to it is still greater than the share opposed to Bitcoin.