Replace the word "heretic" with what a heretic is: "Sinner." Hopefully that will clear it up for you.

No, because we are not talking about any sin whatsoever. A fornicator, for instance, is not separated from the Church due to that sin. There is no censure that needs to be lifted prior to absolution of sins. A fornicator can walk into a confessional, confess his sin, and immediately receive absolution. A heretic cannot do that. 

Otherwise, a Catholic guilty of the sin of heresy could not receive the Last Rites, which they can even when unconscious and dying without any abjuration, and can even receive them from a priest who is also an excommunicant for heresy, schism or apostacy. Clear now?

Where do you get this? 

Canon 731 


§ 1. As all the Sacraments of the New Law, instituted by Christ our Lord, are the principal means
of sanctification and salvation, the greatest diligence and reverence is to be observed in
opportunely and correctly administering them and receiving them.
§ 2. It is forbidden that the Sacraments of the Church be ministered to heretics and schismatics,
even if they ask for them and are in good faith, unless beforehand, rejecting their errors, they are
reconciled with the Church.

On The Subject Of Extreme Unction

Canon 942
This sacrament is not to be conferred on those who are impenitent, persevering contumaciously
in manifest mortal sin; if there is doubt about this, it should be conferred under condition.

Canon 943 
Nevertheless, [the sacrament] should be absolutely conferred on those infirm who, when they
were in possession of their faculties, had at least implicitly asked [for it] or who seemed to ask [for
it], even if later they lost their senses or the use of reason.

Heretics: No. Heretics profess things contrary to the true faith.

Okay, so you do agree that heretics are not members of the Church?