no, goddamnit, feynman was just wrong, some ideas are genuinely irreducibly complicated. i know mathematics it would take literally years to explain to a layman, which is literally why graduate school exists as an institution, to do that
high-level mathematics takes place in a very sophisticated language where every concept is defined in terms of other concepts which are defined in terms of other concepts etc. etc. etc. and fully unraveling all of these concepts back to what a layman would be familiar with takes potentially thousands of pages depending on the subject. and i'm not talking about stuff with no applications, this is the level of effort it would take to fully explain all the math that goes into the standard model of particle physics, eg
other subjects are also like this! you might question whether some of these subjects are mostly fake, towers of theory disconnected from reality, but that's a different conversation entirely. the towers of theory actually do exist and require actual effort to climb
Truly intelligent people can describe complex ideas in a way that a layman can understand. Being verbose is intentional obfuscation to maintain their little "elite" circle.