To me that argument is a much better argument
for continuing to lead His church through a living prophetic figurehead.
Then you misunderstand the argument. Your

rophet" is one of the reasons Jesus knew what would happen. Joseph Mohammed Ellen James Smith is exactly what I am talking about.
He always sent a prophet to people whenever they were led astray:
If that were true, then there would bnot have been 1600 years without a prophet would there? If people were led astray with some Apostasy in 100 AD and, as you say, Jeus ALWAYS sent a prophet when people were led astray, then He would have sent one in 100 AD. Your own argument shows your guy was not a prophet.
these men would reiterate the truths of the gospel, exhort them to pray, repent and turn back to the Lord.
Show me ANYWHERE in Jesus’ teachings that He would send another prophet. ANYWHERE.
But you have an additional problem: Your “prophet” did not reiterate truths of the Gospel and teach to pray. Your prophet : Had at least 9 versions of an alleged First Vision, made up a book, got people to build him a house, was instrumental in a bank scandal, made up a rule to have lots of wives, married dead people, taught that God was Spirit, then taught that God was flesh, made up new gospel that god the father was once man, etc etc etc., then tried to kill people when he went away "as a lamb:. Jesus chastized Peter for using a sword, your guy shoots people with a gun
A point about the OP and thread subject: I agree that with only Catholic understanding and interpretation of the gospel and scriptures, the posed question is a reasonable one. I hope, therefore, you can see that I could just as well ask “is the Catholic Pope/Magisterium really led by the Holy Spirit?”
There you are again, admitting your guys are not prophets and apostles. Again, I thank you