Broadening your perspective by reading these and other books doesnt mean that you necessarily accept or believe everything in them, it simply means you are exercising a Biblical principle.
Proverbs 18:1. Through desire a man, having separated himself, seeketh and intermeddleth with all wisdom.
Hebrews 5:14. But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.
1 Corinthians 11:18 & 19 For first of all, when ye come together in the church, I hear that there be divisions among you; and I partly believe it. For there must be also heresies among you, that they which are approved may be made manifest among you.
1 Timothy 2:15. Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.
1 Corinthians 14:29 Let the prophets speak two or three, and let the other judge.
Christianity is not supposed to be a clean room of sterilized and approved dogma, but one of desire to know more about Him, about His-story and how everything works together. The process is supposed to cause one to examine everything and exercise their senses to discern between both good and evil. What better way than to examine documents that may or may not have scribal or translator bias and filter them through Scripture and the leading of the Holy Spirit?
I have been pleasantly surprised to watch baby Christians with no (or little) exposure to doctrine, make the right conclusions and reject wrong “doctrine” without being able to explain exactly how they knew that it was right. Conversely, I have seen seasoned saints dogmatically assert something to be true simply because someone else said it was so.
I have found that my reading thru some of these books, actually caused me to study the Bible more than I normally did. Sometimes I found precepts in them that I believe do not match with my understanding of Scripture, and sometimes I found precepts in them that are not contradicted by Scripture, but rather expose ignorance and assumptions passed down by presumably well meaning men.
IMO, the results of reading these has been a net gain in my understanding of Scripture, though sometimes the gain has come in opposition to what they claim.