Yes, but only one way to know for yourself.
If you get your data second hand, you subject it to interpretation.
I realize that there is no time to read it all, so I try to keep things succinct, but textbooks are hard to condense.
Unlike the esoterics, those I would recommend skimming over all the names and not wasting too much energy keeping them all straight, but that could be the wrong strategy.
The only way to be certain for yourself is to read them, in my experience.
Look at what folks say about L. Ron Hubbard.
Not all of them are wrong, but neither is what he wrote all wrong, either.
If you take it on the word of somebody else you are getting cheated out of a technology that is both powerful and useful on a daily basis.
Good luck getting somebody that gave their life's savings to find out that all their problems originate within themselves and that others can't make the changes for them to give a good review on that outcome.
However, I read the books and am much more in contact with the actual reality around me.
The illusions of the matrix don't control me as they did.
Makes sense that the control freaks don't want folks reading anything that results in that.