All right, OP. Most people are lazy. I read your post with interest, but I couldn't read all the posts, realizing that, in theory, everyone will be talking about the same thing. People are lazy, and many more think that what happens to someone will never happen to them. Human negligence turns into their own experience, after which people sober up and either begin to become neater or step on a few more rakes to understand their mistakes.
Speaking about the use of wallets, in fact, you need a lot of attention and a desire to understand. This applies to everything: someone is afraid of Linux systems, seeing them only as a command line, which seems to them like a monster, and someone simply does not want to read the network security manual. Knowing that CEX cannot be trusted, someone still leaves their funds there. There are two types of novices: some learn from the mistakes of others, others from their own. And this cannot be changed; everyone has a choice.
This intellectual laziness that only grows...
We have all been brainwashed that keeping our money , investment and control of our finances in general with centralized bodies are the best decision and we bought into the government lies which is why we're unconsciously draw to trust centralized platforms like exchanges instead of trusting our own ability to safeguard our investment. Non traders prefer exchange because they don't have to take responsibility if anything was to happen to their investment. They prefer to blame others than to blame themselves, this exchanges know this and they make their platforms very easy to use and understandable to gained the trust of the newbies to trust them with their coins.
If you have used any centralized exchange you'll understand why newbies prefer to store their coins on exchanges (which is totally wrong). This exchanges are very user friendly and they have other motivational benefits fo holding coins on their exchange. They have staking and saving features that enables all users that have coins on the exchange eligible to receive reward. The exchange are just manipulating their customers into leaving their coins on their platform but this is absolutely wrong as we should only store coins on wallets that give us full control of our private keys.
This famous intellectual laziness is also linked to what you have just said: the lack of responsibility for decades in all areas. The fear instilled in people so that they no longer take any initiative and that they no longer has any critical spirit. They just do what the majority does.
I still want to add one very important thing:
time. Indeed, the cost of living increases, it is often necessary to work more. If you want to raise children, you need money and time. So how, after a day's work, do you find the time when you also have to take care of domestic chores and take care of the children?
Exhausted by such long days, how can you still find the resources to learn?
And I come to the point that seems crucial to me: in almost all societies, it is women who still take care of domestic chores and take care of children, wouldn't this be what makes them less numerous in the cryptosphere? For my part, I used to read a lot at night, after a day's work and after taking care of the house and the children. Physically it is difficult to hold these "double days". Finding time for yourself when you're a mom is not so easy (I'm not talking about wealthy people of course, who have nannies, cleaners, cooks...)
Making sure that people are in debt and have to work until they make a burn out is a clever policy of governments which thus have sheep citizens who, from exhaustion, no longer have the strength to reflect, learn or cultivate their critical spirit.
Finally when some end up being interested in bitcoin despite everything, it will be superficial. A few satoshis on a CEX and that's it. Probably the youngest, without children, will imagine being able to make a fortune quickly (by failing to actually train in trading). They will end up losing their coins on the CEX or being scammed. They are the same ones who lose fortunes in gambling (even if sometimes they have children and are still able to burn the family budget)