I never noticed that misspelling of throne. Good pick up. But 1,000 literal years does not an eternity make.
Well, have to take advantage of humor when you get the chance, right? I'm sure it was the result of auto text crrection.
In regards to the argument presented, it is a false argument. I know of no credible teacher of a premillennial view that tries to make the thousand years other than what it is, and all distinguish between the thousand year period and the Eternal State, both periods clearly taught in Revelation 20-22.
If the reasoning is that because the use of everlasting or eternal is applied in a pre-fulfilled context, that is not a good argument. The first example of why would be in Prophecy concerning Christ, where Prophecy spoke of an everlasting reign which was not fulfilled in His First Coming. Doesn't make the truth any less valid, it just shows the progressive nature of Prophecy.
Another example would be in Matthew 25, which can be reasonably seen to apply to both the Sheep and Goat Judgment as well as the culmination of judgment, where unbelievers go into everlasting punishment, without actually going into Hell (but rather Hades, from whence they are resurrected to stand before the Great White Throne).
We have everlasting life, yet we are still in unredeemed flesh. Does that mean that everlasting life only begins at glorification, when we can say that we have everlasting life that consists both of body and spirit?
Another false argument presented sometimes is that the passage teaches Christ will only reign one thousand years if we take a literal meaning.
God bless.