I think it depends ultimately on the target audience of tools like this. If the target audience are people with a steady income flow that can bounce back from losses, then mistakes along the way are useful long-term. On the other hand, if the target audience is made up mostly of people who don't have the luxury of bouncing back, then those mistakes will be devastating.

It's definitely a fine balance for a product like this. You want to make investing feel "easy" but not so easy that it seems like all it takes to make money is to read a few bite-sized tidbits about a company, thereby increasing the risk-taking behavior.