It’s not similarity, it’s degree of complexity. We humans are at the halfway point, or just slightly past it, in terms of the possible complexity of DNA. The chimps are just below us, IN DEGREE OF COMPLEXITY.
Imagine what the next level might be like. Or the highest level. The next higher level surely exists elsewhere, but they might not look anything like us, as it’s complexity we’re talking about, not identical genetic evolution.
Says who(m)?