the aluminium part i get, but what contains petrochemicals?? Do you mean vaseline?

You’re aware that there are many, many, aluminum, petroleum, and sulfate free products out there, right? You can also just exfoliate in the shower with only a wash cloth and water. Just because there are shitty products on the market it doesn’t mean you don’t have options for healthy, basic, and yes, natural for humans (which are, arguably, not cats.), hygiene.