That's not what Peter's statment means at all. Peter was explaining why Christ's return was taking longer than some expected and Peter was pointing out how time is relative to God. Under you analysis Peter would have believed that Christ was resurrected three thousand years after his crucifixion. Under your analysis when God told Jeramiah that the Jewish exile would last 70 years he really meant 25.5 million years.
Peter says the scoffers were willingly ignorant of IIPeter 3:5 For this they willingly are ignorant of,
that by the word of God the heavens were of OLD, and the earth standing out of the water and in the water:
6 Whereby the world that then WAS, being overflowed with water, perished:
7 BUT the heavens and the earth which are NOW, by the same WORD are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men.
Genesis 1:2 AND the earth was (wrong verb used here as it should be became without form, and void; and 'darkness' (another name for the devil) was upon the face of the deep.
AND the Spirit of God moved upon the face of the waters.
Back to what God had Peter say the scoffers were willingly ignorant of IIPeter 3:8 BUT, beloved, be NOT ignorant of this one thing,
that one DAY is with the LORD as a thousand years, and a thousand years as ONE day.
verse 9 The LORD is not slack concerning His promise, (what promise?) as some men count slackness;
but is longsuffering to us-ward, NOT willing that any should perish, but that all should come to repentance.
Here goes Peter again using that 'day' in verse 10 BUT the 'day' of the LORD will come as a thief in the night;
Now if everybody is expecting Jesus to return why would Peter say that His return would be like a thief in the night....
Because most everybody will believe the first supernatural entity upon this earth is Jesus, when it will be none other than the devil playing, 'come to me' I will save you, 'i am' Jesus and it is Written the majority of the inhabitants upon this earth still in flesh bodies will be holy seduced into by his deception.
We know how long Judah spent in Babylon as it is WRITTEN. We also are told what 'new' religion Judah brought back to Jerusalem with them as well, that too is WRITTEN.