Not so. Regarding 2 Peter 2:20, fast forward this Hebrews 5& 6 message audio player to 46:00. John connects 2 Peter to Hebrew 6 seamlessly.
Hebrews, Vol. 02 (gty.org)
One must get through the bulk of the message to really get a grip on the facts and nuances. MacArthur is not my cup of tea particularly.....but he really does do a great job of dispelling the "lose your salvation" myth that many impose upon these passages.
What we are dealing with here (Heb 6, 10 and 2 Peter) is JEWISH APOSTASY. Walking away after having been fully informed by unassailable knowledge and unimpeachable witnesses.
THIS is.......apostasy aka "turning away". The text is perfectly clear in the matter.
2Pe 2:20
For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ,
they are again entangled therein, and overcome, the latter end is worse with them than the beginning.
2Pe 2:21
For it had been better for them not to have known the way of righteousness, than,
after they have known it, to turn from the holy commandment delivered unto them.
2Pe 2:22
But it is happened unto them according to the true proverb, The dog
is turned to his own vomit again; and the sow that was washed to her wallowing in the mire.
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Again.....THIS is apostasy. Bailing out. Walking away. One cannot come to any other conclusion.
Heb 10:26
For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
Heb 10:27
But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries.
Heb 10:29
Of how much sorer punishment, suppose ye, shall he be thought worthy,
who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?