All you need is the definition of a pastor ( bishop), deacon, church leader from scripture and you have your answer right from scripture. It's cut and dry by definition.
Not really, because church is very different now to what it was after Pentecost.
We have dozens of denominations; I'd be the first to say that we shouldn't, but we have.
Anything beyond that is a humanistic view or twisted words from out of context other portions of scripture. As humans we can make anything work then justify it. Or it's a doctrine formed by churches or denomination outside of what scripture says and we simply swallow the bait because it sounds good.
But you could say that about anything.
Scripture mentions wearing robes, sandals and treating your slaves well. Do we do that? No, we wear clothes appropriate to our culture and most of us don't own slaves.
Scripture does not refer to using computers, power point, visual aids, driving cars, using mobile phones, showing films, having Ministers who wear dog collars or choirs who wear robes etc. Do we do that? Why; if it isn't in Scripture? Is that humanistic? No, it's using what we have to get the Gospel across. They didn't have these things in NT times, so they aren't mentioned in Scripture.
That said there are some great women teachers
Yes, because God calls some women to teach and gives them the gifts to do so.
Paul did not say that any of the gifts of the Spirit - including teacher and Pastor - were for men alone.
There are ordained women pastors who do a great job, ordained by churches, bible schools, ordination boards. If they are ordained by God remains to be seen, we will know one day.
You can know now, if you ask them how God called them and listen to their testimonies.
God called Deborah to be judge over the entire nation; why should he not call a woman to lead a church?
While There are no female pastors we do have many female leaders for bible study, womens seminars etc. We do nothing outside of scripture, at least not deliberately.
Presumably you wear robes and sandals, do not allow women to wear gold, (so no wedding rings in church), do not allow a man to have long hair, (tricky; Paul does not specify the length which is acceptable). Presumably, also, you speak Greek and Hebrew?
Do your male pastors wear dog collars and preside at communion services? That's not Scriptural. Jesus told his disciples to "do this in remembrance of me"; he didn't say they had to wear a dog collar.
And as I said above, Scripture doesn't mention computers and the like - whatever your church does, you are using one now.
Any doctrine that a person/group presents has to be Scriptural.
If someone says, "God told me ...." and that is not a Scriptural teaching by, or about, Jesus; then he didn't. Rather like the Moonies, whose leader claimed that he had seen a vision of Jesus, and Jesus told him, "Rev" Moon, that Jesus had failed while on earth, and he, Moon, was the new Messiah. That is not a Scriptural teaching; Jesus did his Father's will and said "it is finished" on the cross - therefore, "Rev" Moon's claims were untrue.
But there are dozens of cultural teachings and practices in Scripture which we do not do today because we do not have the same culture. Even the Jews don't obey OT teaching about offering animal sacrifices.
Assuming that a society today has to follow the same societal practices in Scripture, is incorrect. It would be like trying to jail a Brit for not obeying the American constitution, or criticising an Eskimo for not wearing a suit and tie for work.