That logic seems to be popular in the mormon culture and it has always bothered me. I see it here on the forum a lot in the form of phrases like "Why do you want to know that?" "Why bother speculating?" "Youre missing the mark." "etc.
Why would the Lord even give us brains if we werent supposed to use them? Some people seem to forget the "study it out by reason" portion of the scripture. But I think this:
“A man is saved no faster than he gets knowledge, for if he does not get knowledge, he will be brought into captivity by some evil power in the other world, as evil spirits will have more knowledge, and consequently more power than many men who are on the earth. Hence it needs revelation to assist us, and give us knowledge of the things of God.”
"God has more power than all other beings, because He has greater knowledge;"
"And if a person gains more knowledge and intelligence in this life through his diligence and obedience than another, he will have so much the advantage in the world to come."
Why do some people think it is a sin to 'think too deeply'?Wisdom resteth in the heart of him that hath understanding: but that which is in the midst of fools is made known.

