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Wild Shape starts at 4th level, unless you've taken an archetype that delays it.
As for the morality of conjuring allies of nature, I quote from the description of Summoning in the Magic chapter:
A summoned creature also goes away if it is killed or if its hit points drop to 0 or lower, but it is not really dead. It takes 24 hours for the creature to reform, during which time it can't be summoned again.
Emphasis added. For a summoned creature death is like waking up from a bad dream and being really shook up for a day. Definitely unpleasant, but not permanently debilitating.
If you really want to focus your ire on a morally dubious class feature, cast your eyes over to animal companions. A boar who becomes an animal companion, for example, is taken away from the ordinary business of being a boar and forced to act in manifestly unnatural ways. He might be outfitted with armor, and is very likely going to be forced to fight creatures he would ordinarily flee on sight: undead, aberrations, heavily armored people trying to kill him, and so on. During all of that time of service, he's not off in the woods rooting for mushrooms and making baby boars. And if he happens to die in one of those fights, that's it -- that death is real and permanent. He'd be better off getting summoned.