Their existence is not at all dependent on such things. (Note that I didn’t use the word “always”.) If the answer to a question of “Why [...]_1?” would be “Bec

Their existence is not at all dependent on such things. (Note that I didn’t use the word “always”.) If the answer to a question of “Why [...]_1?” would be “Because there is a [...]_2 such that [...]_3 .”, then there is such a [...]_2 such that [...]_3 . (Possible exception : if “because you asked that question” would be part of the answer.)