See studies on honey bees behavior with a 900 MHz transmitter. Or you see studies talking about how electromagnetic fields interfere with the calcium ions receptors in the cell, this produces oxidative stress. Seeing that after all the scientific literature written about it.

For everyone open-minded to the true a 1h long speech from the University of Melbourne https://www.youtube.com/watch?v=BwyDCHf5iCY

I think that the number 1 reason to not use brave is that is based on the chromium engine. The number 2 is that they use limited anti fingerprinting tools and support his self built tracking and ads. The others about ideology of the CEO i think are not so important.