Yes but there's a difference.
Individuals holding heretical beleifs within the church are INDIVIDUALS they are nt preaching a false doctrine.
Protestant churches with heretical DOCTRINES are out there evangelizing false doctrines to the masses.
The truth is within the Catholic, and Orthodox church, for individuals to find, whether they find it is still up to them. (Freewill yet again).
Yet members of these protestant churches would have to hold TRUTHFUL convictions (abortion is a sin) which would be heretical to their own church's false doctrine, in order to find the truth.
Once again ... any church could choose to call itself 'Protestant'.
That doesn't mean that it is.
Any believer in any church must 'test the doctrines' of that church by scripture to determine whether or not it is of God.
If one's church's doctrine does not conform to the scriptures, ... then you should look for a 'true' church.
The scriptures are the ultimate objective baseline against which one might make such a determination.
Most beleivers go to the church their parents did or not at all.
A handful more go because some guy at the mall handing out pamphlets said it was a good idea.
Few of either have read even 1/50th of the bible.
Most beleive the gospel of the Beatles is the gospel of the Bible; all you need is love. And the bible they look at as a buffet with 'ill take some of this and some of that, but that there is aweful i don't want any of that'.
The Catholic and Orthodox doctrines which are all based in scripture as well as the tradtions the apostles gave us (save a few silly Catholic innovations like papal superiority, and roman superiority).
"Once again ... any church could choose to call itself 'Protestant'.
That doesn't mean that it is.
Any believer in any church must 'test the doctrines' of that church by scripture to determine whether or not it is of God.
If one's church's doctrine does not conform to the scriptures, ... then you should look for a 'true' church.
The scriptures are the ultimate objective baseline against which one might make such a determination."
Here's a question for you from another Orthodox Christian. If the very earliest Fathers of the Church, men who lets say knew the apostles, were their disciples, carried on active communications with them in writing and in person, declared that The Church was hierarchial and that those who did not accept the Real Presence of Christ in the consecrated bread and wine of the Eucharist were not part of The Church, would you say that they were wrong or deluded in some fashion?