I think this is very naive. The whole reason marketing is so lucrative is because the human brain is so easily exploited. That exploitation is to no benefit of society or the individual and an individual practically stands no chance against it.

We also don't allow drugs to be distributed and marketed. There are many limitations to cigarette sales and they have shown to be successful.

Maybe the next thing someone sleepwalks into is a pleasant conversations with people or coding a great open source project and that is not something that needs to be fixed.

It's naive and not naive. The brain is easily exploited mainly due to lack of awareness and education on the matter. It's not inherently exploitable itself. People simply are unaware of it happening. Those who are or become aware, generally get really turned off by it.

I do agree, it's naive in the sense that you say, most people do seem unaware for the large part, atleast of the effect it has on them untill its too late (and they complain about it themselves - it's all subjective ofcourse).

I don't think the next thing is someone sleepwalking into pleasant conversations with people coding etc. - I would love that, but i don't see a company earning billions from it - so it's unlikely.

The reason they get you to sleepwalk into things is because they know you wouldn't consume it when awake. Its not because people naturally sleepwalk all their lives...