*because of the mountains of mutually supportive evidence showing common Descent.
The Cambrian falsifies evolution, observations don't match empirical expectations, cling to it, its a security blanket for some people, I understand that, I understand their need.
And the absolutely zero evidence of magical creation of species without ancestors.
If the Cambrian fauna were instantly created in some way, then we'd expect to see whet we find. Dramatic sudden appearance of complex already diverse life. If evolution is false we'd expect to find what we find, stasis from the point of view of new phyla.
This cherry picking cases in vacuum tactic is not going to work for you. It's an old tactic.
It's science, diving in and studying the failures of the theory. Newton's gravitation was falsified by cherry picking one observation, the orbit of Mercury, in every other sense the theory looked good, very good but Mercury was a stubborn issue and eventually heralded relativity a very different theory with very different premises.
If we take the history of life on earth (about 4 billion years) as a 24 hour clock then there was nothing but bacteria for the first 18 hours,
three quarters of the time life existed it was just single celled, nothing else, no changes to speak of, no gradual increase in complexity at all - stasis.
At around 9pm on that imagined clock - 21 hours out of the 24 - within the space of less than 120 seconds, almost all of the current complex animal phyla came to exist at around the same time and those phyla (body plans) have not changed, few new ones have emerged.
So we have no evolution for 75% of the "day" and then within 0.1% of the day, all complex animal phyla emerged at around the same time, huge increase in sophistication - shells, eyes, stomachs, etc.
That's why its called an explosion, it reveals the exact opposite of what evolution would lead us to expect, just
click the video to hear Prof. John Welles explain this, it's already prepositioned:
Evolution is propped up by faith, the many problems (like the Cambrian) are swept aside as "cherry picking" odd but not significant, that's the arena we are dealing with in this. The emphasis on the few observations that seem to support the theory and the dismissal of the many that don't.
It's faith not science, the theory must be preserved at all cost, once you take the blinkers off, face reality you'll begin to see, but you must be willing to handle the reality, life did not evolve, if that reality is too much for your little mind then of course you'll deny, run back to the fairy tales.