"Trust me" is also shorthand for "I have reflected deeply on this, and based on my personal experience, and our shared humanity..."
It's obviously not foolproof to make predictions about another person's experience based on your own life, but this is perhaps a more charitable interpretation of what GP meant by "trust me".
Fair enough. I was annoyed because I have found those particular authors hard to connect with, and now some random dude wants me to trust him that they're good for no stated reason.
But yes, the principle of charity should always apply and yours is the correctly charitable one.
It's obviously not foolproof to make predictions about another person's experience based on your own life, but this is perhaps a more charitable interpretation of what GP meant by "trust me".