There are two outlooks that one can get attached to. One outlook says “It matters” & the other says “It does not matter”. But let’s look more closely.

When “it does not matter”… the ‘it’ can stand for “It matters”
Therefore, “It matters” does not matter.
Similarly, “It does not matter” matters.

Rephrasing the same
It does not matter even if it matters & it matters even if it does not matter.

So does it matter?