Moreover, the whole nation that similarities automatically involves relatedness via common descent is just a large, and totally unproven assumption.
Any time that you conclude that an animal is a cat because it looks like other cats; any time that you cracked open a field guide to find out what mushrooms were safe to eat; any time that you remarked on a striking family resemblance between two of your relatives, you've proved the fundamental accuracy of inferring shared ancestry from shared characteristics.
Taxonomic categorization had been practiced for hundreds of years prior to the development of evolutionary models. It's the basis of the time-honored Linnean system of classification. And, predictably, you've only decided to raise an objection now that its a threat to your intellectually vapid spirituality.