You've acquired a lot of misinformation.
You said,
That wasn't true during the establishment of the church and it's not true today.
Apostles had to witness the ascension of, and be hand picked by Christ.
Prophets were office holders second to apostles. After the church was established they were no longer necessary.
You also said,
You obviously didn't read the OP very well. Anyone can declare the Word of God. It's not something only a prophet can do.
This is what Vines say's,
Prophet:
"one who speaks forth or openly" (see PROPHECY, A), "a proclaimer of a divine message," denoted among the Greeks an interpreter of the oracles of the gods.
In the Sept. it is the translation of the word
roeh, "a seer;"
1Sa 9:9, indicating that the "prophet" was one who had immediate intercourse with God. It also translates the word
nabhi, meaning "either one in whom the message from God springs forth" or "one to whom anything is secretly communicated." Hence, in general, "the prophet" was one upon whom the Spirit of God rested,
Num 11:17-29, one, to whom and through whom God speaks,
Num 12:2;
Amo 3:7,
8. In the case of the OT prophets their messages were very largely the proclamation of the Divine purposes of salvation and glory to be accomplished in the future; the "prophesying" of the NT "prophets" was both a preaching of the Divine counsels of grace already accomplished and the foretelling of the purposes of God in the future.
In the NT the word is used
(
a) of "the OT prophets," e.g.,
Mat 5:12;
Mar 6:15;
Luk 4:27;
Jhn 8:52;
Rom 11:3;
(
b) of "prophets in general," e.g.,
Mat 10:41;
21:46;
Mar 6:4;
(
c) of "John the Baptist,"
Mat 21:26;
Luk 1:76;
(
d) of "prophets in the churches," e.g.,
Act 13:1;
15:32;
21:10;
1Cr 12:28,
29;
14:29,
32,
37;
Eph 2:20;
3:5;
4:11;
(
e) of "Christ, as the aforepromised Prophet," e.g.,
Jhn 1:21;
6:14;
7:40;
Act 3:22;
7:37, or, without the article, and, without reference to the Old Testament,
Mar 6:15,
Luk 7:16; in
Luk 24:19 it is used with
aner, "a man;"
Jhn 4:19;
9:17;
(
f) of "two witnesses" yet to be raised up for special purposes,
Rev 11:10,
18;
(
g) of "the Cretan poet Epimenides,"
Tts 1:12;
(
h) by metonymy, of "the writings of prophets," e.g.,
Luk 24:27;
Act 8:28.
This is what Thayer say's,
1) in Greek writings, an interpreter of oracles or of other hidden things
2) one who, moved by the Spirit of God and hence his organ or spokesman, solemnly declares to men what he has received by inspiration, especially concerning future events, and in particular such as relate to the cause and kingdom of God and to human salvation
a) the OT prophets, having foretold the kingdom, deeds and death, of Jesus the Messiah.
of John the Baptist, the herald of Jesus the Messiah
c) of the illustrious prophet, the Jews expected before the advent of the Messiah
d) the Messiah
e) of men filled with the Spirit of God, who by God's authority and command in words of weight pleads the cause of God and urges salvation of men
f) of prophets that appeared in the apostolic age among Christians
1) they are associated with the apostles
2) they discerned and did what is best for the Christian cause, foretelling certain future events. (Acts 11:27)
3) in the religious assemblies of the Christians, they were moved by the Holy Spirit to speak, having power to instruct, comfort, encourage, rebuke, convict, and stimulate, their hearers
3) a poet (because poets were believed to sing under divine inspiration)
a) of Epimenides (Tit. 1:12)
Anyone who claims to be a prophet or apostle today is a false one.