I consider preterism incorrect because AD 70 was “A” Day of the Lord, Lk 17:22.
Lu 17:22 And he said unto the disciples, The days will come when ye shall desire to see one of the days of the Son of man, and ye shall not see it.
It was a time of destruction, (Is 13:6) which is the scriptural definition of the “Day of the Lord”.
It was not a time of salvation (Heb 9:28).
Thus it does not fit the scriptural definition of the Second Coming found in Heb 9:28, which describes the Second Coming as a time of “salvation”.
The Second coming occurs when a person “Repents” of unbelief and the Father sends Jesus to them.
Jesus said “It is finished” from the cross, and scripture contains only one instance of His coming after the crucifixion.
The Second Coming occurs in an individual’s life when they repent of unbelief and “all things” are restored at that point of repentance.
John the Baptist’s ministry preached repentance –
Mt 17:11 And Jesus answered and said unto them, Elias truly shall first come, and restore all things.
Ac 3:21 Whom the heaven must receive until the times of restitution of all things, which God hath spoken by the mouth of all his holy prophets since the world began.
An individual’s repentance from unbelief “restores” all things.