The "lost bitcoins" figure is misleading, since most of these happened during the early days of Bitcoin when their value was low and mining outputs high. Little care was taken about backing up wallets, many have simply been abandoned. The new users of 2021 did not handle thousands of Bitcoins.
A relevant comparison should rely on surveys realized in recent years, where crypto holdings represent significant monetary value for most participants and where tooling has improved to be slightly safer.
As such, I'm not convinced that your conclusion is right. And if we add "lost gambling on cashgrab investments" to the scam category, I'm fairly sure it is wrong. From experience prowling many crypto developer communities, everyone in the field discusses investments at some point, so as a user you cannot avoid building an understanding of those mechanics as well.