im not really sure what your trying to say...first you said the idea of the Holy Spirit making someone pray for things that they dont know they need was stupid, yet romans 8:26 validates this. the bible also says that the outward evidence of being filled with the Spirit is speaking in tongues.
on further note, 1corinthians 14:22-25 says, " wherefore tongues are for a sign, not to them that believe, but to them that believe not: but prophesying serveth not for them that believe not, but for them which believe." if therefore the whole church be come together into one place, and all speak with tongues, and there come those that are unlearned, or unbelievers, will they not say that ye are mad? but if all prophesy, and there come in one that believeth not, or one unlearned, he is convicted or all, he is judged of all:and thus are the secrets of his heart made manifest; and so falling down on his face he will worship God, and report that God is in you of a truth."

as you see from the above quoted scripture, not in my words but in God's, you see that tongues is a sign to believers and used as prophecy to win unbelievers. those are just two examples of which the bible gives more on the gift of tongues. you seem like someone that has faith, so why do you take only some of the scripture when it comes to tongues instead of all of it? the bible is not a buffet my friend, you cant just pick and chose scripture or twist it