That some hamsters aren’t going to be super cuddly pets. These small rodents can be tamed, but many will not fully tame down. I think it’s important for guides to note this so peoole aren’t left feeling hopeless and frustrated, and hamsters aren’t re-homed for being “aggressive”
Aside from that- you’re also going to have to be careful as to where you’re getting your information from. Many sources are biased or rely too heavily on anecdotal evidence rather than science. Anybody can make a guide, but not everybody understands the true needs of a hamster. I recommend searching all through these forums, and reading a wide variety of guides to get a better idea. Best wishes