Do we also not have an obligation to dumb down these lectures to make them more understandable for people with lower IQ? Where do we draw a line as a society on

Do we also not have an obligation to dumb down these lectures to make them more understandable for people with lower IQ? Where do we draw a line as a society on who to help and who not to? I'm genuinely curious about this issue and have been and I'm not trying to insult anyone. It's certainly not the person's fault that they got a lower IQ just as much it isn't the deaf person's fault for being deaf. Why do we treat certain disabilities differently and not pay attention to whole slew of other disadvantages that people might be suffering from? Are we therefore not misguided in trying to correct these issues when we know we're not eliminating most of them and making matters slightly worse for everyone else?