Alice-in-Wonderland interpretation.
If they are elect, the outcome is certain, however you explain it. In eternity past the outcome was settled long before man was created. The chain moves from foreknown to glorified, all using past tense.
Saying "not prestinated to Heaven" is absurd, because they are predestinated to be conformed to the Image of His Son that He might be the firstborn among many brethren."
If they are predestined to be conformed to the image of Christ that implies Heaven. How could anyone be transformed to be as Christ and then denied Heaven???
The 'absurdity' that you think you see is in term or '
how' God uses the word 'predestinate'. Each place that that word is used [look it up] it's predestinated 'to' something that comes 'with' salvation. Talking about 'those verses' that use that term. It's not a term used regarding a person being "elected or chosen" to be saved without God's foreknowledge of what their response will be to His invitation and they will accept the "invitation" by their own freewill. God doesn't create robots with no freewill to choose.... "Choose you this day whom you will serve".
Commands that require a man's freewill are through-out the Old & New Testaments and their salvation hinges upon their ultimate and final decision of whether to obey His Words or not.
God says regarding His commands that go along with His invitation - "If you will - I will" --- "If you don't - I won't" - from cover to cover. Ezekiel 3:18-21 is just one of hundreds of examples ... and those type examples run right through from the O.T. to the N.T., to the Revelation.
No yellow brick road if you read it without a preformed-chosen bias formed from Augustine/Calvin & Co. Just read The Word as it's written literally.
Even the word "heresy" means "choice, the opinion chosen" .... that's More freewill.
My main point is - God does not just randomly decide before the foundations of the world, who He'll send to Hell without a very good reason ... that they rejected His call, His Words and obedience to them.
God is not willing that any should perish but that all would come unto repentence!