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Diversification can be a tricky idea for newbies making them feel that theu have better luck for progress or to be rich by putting their eggs in several basket but also making them forget that the more you invest the more profit you should expect if eventually the asset does well, when it comes to bitcoint its has become so obvious that if you don't have a good stash or have not accumulated enough bitcoin then you should bother less about any price increase.
I am not sure if you are saying that correctly... because sometimes for newbies diversification is a kind of security blanket of not really knowing what they are investing into, and so yeah, sure most people don't know, and even people who invest into bitcoin, sometimes do not really know, so even though some of us might say to stop fucking around with shitcoins, there can be a perception that the bitcoiners are biased and we are merely pumping our bags.. .. so there is some kind of need to build some kind of a conviction in regards to the asset in which we are investing, so frequently if there is doubt about bitcoin, then there is going to be receptivity to both the shitcoin talking points, but also shitcoiners will also frequently be pushing the benefits of diversifying just in case bitcoin does not work or that some of the shitcoins might perform better than bitcoin and/or various other talking points, which frequently will sound convincing to a newbie.. including the "need to have an open mind".
Your very right, ideas of early diversification usually sprout up from uncertainty or disbelief on the asset they are investing into and in this case bitcoin, many people might not even know what bitcoin is or even have a sence of worth for its Value or be able to differentiate it from a shitcoin and approach it likewise so there could be this snece of wanting to diversify into other asset to be safe incase bitcoin doesn't do well or to also use shitcoins as a recovery incase bitcoin doesn't do well.
The best way to fix this kind of mentality If for newbies to come to have a conviction on bitcoin themselves and the vest way is to get started accumulating bitcoin and get to understand how bitcoin works.
Why this is important is cause if theu remain prone to disbelief they would always be open to shity talks about bitcoin and to invest in bitcoin and also they would not not be able to have rest investing in bitcoin cause they would always want safety or even consider using ETF vehicles or if they can't afford diversification they start to panic under small news or keeping close eye on their investment and this could also hinder how much they can invest in bitcoin.