Lets go back one verse to 1 Tm 3:14
14These things write I unto thee, hoping to come unto thee shortly:
15But if I tarry long, that thou mayest know how thou oughtest to behave thyself in the house of God, which is the church of the living God, the pillar and ground of the truth.
Now it becomes clear that Paul was telling them in his letter (inspired by God) the things they needed to know until he came to see them shortly. How to act in God’s Church.
GOD’S WORD® Translation (©1995) translates as this
in case I’m delayed. I want you to know how people who are members of God’s family must live. God’s family is the church of the living God, the pillar and foundation of the truth.
Darby Bible Translation translates as this
but if I delay, in order that thou mayest know how one ought to conduct oneself in God’s house, which is the assembly of the living God, the pillar and base of the truth.
God’s infallible Word needs to be our guide, not a fallible church.
I still see the church as the pillar of the truth in those verses.