The premise ‘nothing lacks identity’ is flawed. There are some things which do lack identity. The intermediary statement is ok, but the conclusive conditional, that it’s not that identifiability is a function of selfhood, or it’s condition to selfhood, is not connectable to the premise.
Why? Because the identification of the premise is strictly definitainable, whereas selfhood entails more then just mere definitions.
Example: I can define things according to current usage, as say in, (pointing to some thing, let’s say a box) and identify it. However I can also point to a non identify able figure, and call it-whatever. There are plenty of on identify able and meaningless words, as there are things to which there may not exist an identifiable concept.
A deformed structural 3 dimensional thing, with many sides, angles, and juxtaposed here and here, may then simply be an object of inquiry, ‘what’s that’?
If an inquiry has to be made, we face an infinite reduction, because the most that can identify that thing, is- ‘it’s a thingowhamithcy’. That a thing is a thing is a thing, is not a description of an object.
Finally, if it’s claimed, that it’s lack of identification is merely an absence of its self implies it has a self , an I it’s self, meaning it has a transcendental existence, Being. Again, this self, is no validation of it’s self, since that implies another total reduction from being into nothingness, in the Sartrean sense. It’s identity is hidden, it is manifested only as a negation, which You originally pose in Your opening.
Negation does not equal an absence of it’s self, negation is only a logical possibility of presence.
Just because it’s logically possible to negate some thing, does not mean that it actually is, because:
It’s rather like this: if there was a thing , of which it could be claimed to exist, then it’s equally possible that that thing does not exist.
That is all Your premise necessarily states. The outflow into presence and absence as equally negate able. Or nihilizable, is not justified. Hence Your argument is vacuous, and dis associative.