Sure, on an individual level. But that sounds like a failure at the societal level to me. We shouldn’t want the only people sharing their expertise to be the most comfortable with publicity.
If the ideas are about purely intellectual things, that's fine.
But if the ideas are about people's lives or actions, or any complex system in the real world, then the idea isn't really fully fleshed out until someone starts to implement it.
Your supposed “real world alternative” is pop-philosophy writers and loud, attention-seeking people on social media influencing what we ought to do about seriously complex issues like abortion.
Examples include economic theories, military strategies, business plans, and getting people to do anything differently at all. Making these work requires attention-getting, sales, and mass attention, frequently on social media.
Now if someone has a new theory about calculus or the atom, no ordinary person is going to care and no external factors are involved, and that idea stands alone from its implementation.
Academics only really need to worry about the perception of their work by other academics, which isn't inherently tied to results (a notable exception is the hard sciences, which are conceptually much closer to industry).