Don't know if anyone has ever considered this (ignoring gross simplifications), but as depictions of aliens are typically conceptualized from creatures we see o

Don't know if anyone has ever considered this (ignoring gross simplifications), but as depictions of aliens are typically conceptualized from creatures we see on earth. Is it possible that if we are the only living creatures that have (yet) gained heightened consciousness, then spreading the DNA of all life on earth across the universe in a similar fashion to how our microbial life arrived on earth is how we ensure that life truly goes on if we fail?