You know that much more intelligent people are still doing evil stuff right now and more often than not, because other people do either not act intelligent or consequential. I have a few examples: grandchildren-trick in germany, which relies inherently on grandparents being naive or ignorant about technology or that they might be betrayed. They never thought about that, in that regard you might count being ignorant or naive also as stupid. Another example: some people get into magazine subscriptions and never stop them, even though they do not like it, just because unsubscribing is too inconvenient or saying no to the sales man is too hard. Another one: People go to financial advise and do not know most things about personal finances and investments. So they literally have to trust the advisor, who sometimes only works to get the most out of his customer into his own pocket, that could only be avoided through knowledge and experience, which are traits, that are also associated with smartness. Although not all those people maliciously choose to exploit those naive or lazy or ignorant people, they rely heavily on them to earn their money. If those people would not let themself get exploited, there would literally be less evil, because it could not be commercialized in that way. Hell, even corporate and governmental employees are sometimes as stupid as they could not even send a simple e-mail (there are examples), and would not even learn it, if shown.
I do not accept any answer like "those people that exploit others will find ways", as you do not know if it would be that way.
I also do not accept anything defending the exploited people, who in my opinion are not inherently stupid from the mentioned circumstence and I do not mean any harm to them. But the things that happened are literally stupid things, that could easily be avoided, so they have done something stupid, as does anyone in this world, so no evil feelings there, just improving the debate focus.
And to answer anything, that would say that some people might have a disability or illness and therefore might be easier to exploit, which could be the case. Those could also be exploited, even if everyone becomes smarter, but: there is a solution to that and that is societal support and care work. If you have a right to health care and to be supported by society to make up for your disabilities, then a judge or judgementally assigned professional might decide for you, so that you do not have any disadvantages due to those circumstances.
not bad!