It's notable that realization doesn't stop you from participating in this forum, or using likely other free apps, google, and most of the internet. Obviously there is a tradeoff in these activities. In the case of Mint, I judge it a plus for me.
I am certainly no expert in this. But I have read opinions from more verifiable experts saying the risks in using aggregators are very small. I am very comfortable going with them over those who proclaim themselves experts here.
Everyone assesses and makes judgments about risk differently as is so apparent in the divergence of opinions and behavior regarding risks related to the pandemic, personal finance, medical care and countless other arenas. I've learned that worrying about other people's choices, or spending a lot of time persuading them they are wrong or foolish in making them, is generally unproductive.
Totally agree and I use many free services. I guess it depends on the amount and type of personal info I've shared. This forum does not need my id and password for my investments.