[jplr8922]

*wouldn't the most accurate advice be to ignore all the marketing*

Your point is right, but I'm afraid that the underlying advice is not applicable. First of all few people are truly in control of their attention span, and we are all exposed to marketing wether we like it or not. You might as well ask a dog to ignore the smell of food.

*If people are inundated with marketing telling them to be active investors, telling them to be a more informed active investor is not the solution*

The problem with some popular financial apps is that the marketing is 'built in as a feature'. My banking app allows me to create a 'saving account', which sounds like a good think to do right? However if I click, I will have ''investing options'' to choose, which are all financial product sold by the institution. These types of 'financial dark patterns' are all over the industry. In Canada, I consider those to be built in by law, and are not likely to change any time soon.

Managing investor bias is not something you can achieve with a mathematical argument; it requires patience, trial and error. People who are bombarded with marketing about stock trading will avoid ETF and trade stocks. I think that a lot of them would benefit a learning environment which was not created by financial institution to sell them products in the first place. You could then introduce a feature, where the apps suggest some ETF information if the portfolio is hyper concentrated in a few stock, etc.