Matthew 15:14 New International Version (NIV)
14 Leave them; they are blind guides. If the blind lead the blind, both will fall into a pit.”
When there are so many self-proclaimed religious “experts” around preaching all kinds of different things that contradict each other, one can easily deduce that most of it is bullsh*t.
Yet, many seem happy to recklessly assimilate into their own belief system all kinds of ideas, with little regard to the degree of evidential support. They do so despite the availability of many alternative ideas / perspectives that they prefer not to address.
Similarly, most religious “teachers” feign expertise by parroting ideas that they simply plagiarise from whichever popular / famous source that best fits what their audience like to hear. No matter how many well-meaning, honest teachers there are (healthy food), if people demand junk food, there will be no shortage of miscreants who will supply it (demand = supply).
Hence for example in Christianity people go around chanting formulae like “saved by faith alone”, “Jesus died to pay the penalty”, etc., without having any clue how such formulae were derived in the first place (or the legitimacy of the methods used to derive such formulae). They don’t recognise the junk because they do not read the ingredients list, nor understand basic nutrition science.
In their religious practice, careful reading of the bible (whose truth they claim to value) is replaced with oversimplified junk ideas that taste good (to the undiscerning palate), but have no nutritional value (often downright toxic).
Most people avoid the hard work of deriving the correct solution / formula, and instead skip to the “model” answers provided by whichever source they happen to fancy, even though the “model” answers differ drastically depending on the source. Thus, they never really learn anything.
2 Timothy 3:4-7 New Revised Standard Version (NRSV)
4 treacherous, reckless, swollen with conceit, lovers of pleasure rather than lovers of God, 5 holding to the outward form of godliness but denying its power. Avoid them! 6 For among them are those who make their way into households and captivate silly women, overwhelmed by their sins and swayed by all kinds of desires, 7 who are always being instructed and can never arrive at a knowledge of the truth.
2 Timothy 4:2-5 New International Version (NIV)
2 Preach the word; be prepared in season and out of season; correct, rebuke and encourage—with great patience and careful instruction. 3 For the time will come when people will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear. 4 They will turn their ears away from the truth and turn aside to myths. 5 But you, keep your head in all situations, endure hardship, do the work of an evangelist, discharge all the duties of your ministry.
(There are also those who like to think of themselves as discerning, having read different model answers and picked the one that sounds best. But because they have not learnt the requisite maths to derive the formula from scratch, their “sounds good” criteria is largely arbitrary and useless.)