You seem to consider the Church to be a human institution, and indeed one that lacks authority.
This is seriously erroneous. The Church is protected from teaching error in its universal teaching. It also requires anyone who writes on theological matters to submit their writings for approval to the authority of the Church, which enjoys divine protection from error, and to which we as Catholics are required to submit.

Dude, your utopian view that an orthodox/traditional church is 100% free from error is not possible. The ONLY person who is free from error is the Pope. And that's not 100% of the time, but only certain times.
If you think that the pope is spending his time reading/approving
a. every docuмent, sermon, book, pamphlet, booklet, flyer, etc
b. from every country
c. from every state/region
d. from every diocese
e. from every cleric, monk, priest, bishop, etc
This is ludicrous. It simply doesn't happen.
What happens is that a priest passes on his book to HIS LOCAL BISHOP. And the Bishop approves/disapproves of it. And...
a. This approval is a negative approval,
b. i.e. imprimatur = nothing is contrary to the faith
c. An imprimatur doesn't mean it's 100% accurate, nor does it mean that the priest's opinion is accepted by the Church.
d. Especially in regards to theological speculation...since the Church hasn't defined the answer, then the entire book is theory.
Just like AT THE TIME, St Thomas' view on the immaculate conception was allowed (because the doctrine hadn't been defined). You can't retroactively say that St Thomas' book "contained error" because AT THE TIME, his views were allowed as theory.