I think koolba's point was not as much about the tool being open-source as it is for a tool that runs on your machine and accesses your database with write permission, not having any guarantees it does the job it promises.
I could not agree more with him. This tool was born as a side project for my personal need, so I obviously use it without hesitation. But obviously, there is nothing to ensure you the tool won't drop your DB out of nowhere, or dumps your data somewhere else.
I think going open source will allow me to build some credibility for now.
PS. I use this tool daily, but I have to admit, in prod env I have read only user.