There’s a very real difference between honesty and transparency. Being honest I can say that my revenue on YouTube has gone up by 30% since I started doing Mukbangs. Being transparent would be saying exactly how much money I’m making is. There are very real reasons that mentors and advisors cannot no, and do not want, to be transparent even when they are being completely honest.
Bad mouthing peers and competitors actually damages you.
Mentors can get you ahead in life, but they are not a limitless resource.