I wouldn't say it is fud. There was a legitimate vulnerability, which thankfully (this time) was picked up when only minimal damage was done. What if the bug went unnoticed for months, and resulted in losses of hundreds of millions which Binance were unable to cover?

This is part of the risk you take when using closed source software like Trust wallet. It can be filled with all kinds of bugs and vulnerabilities, and no one would be any the wiser until it is too late.