This is a huge waste of time and not worth it. The amount of hours you spend fixing errors manually vs the small risk your info gets out I don't think is worth it.
Is it a small risk? The track record of information security with corporations is dreadful and brokerage login details are about the most expensive things one could have stolen.
Completely disagree. Weighing risk vs reward the risk is that my identity gets stolen while the reward is that I don't have to login to my accounts and enter information manually.
At some point I suspect every person on the planet will have experienced a data exposure event and the question will switch from: have you ever had your info leaked?, when was the last time your info was leaked? It's not a small risk.
The amount of work you'd have to do to correct a stolen identity is far less than the amount of work to log in to 10 accounts periodically,dump the data, format it, import it, and fix any issues