Deer can be shot with their face in a corn pile now so shooting a spotted fawn shouldn't matter, either. It's just a deer.

Shoot it in the head, skin it, gut it, cut off the legs at the knees and cook it whole.

The reasoning of "There is no biological reason not to" is accurate. It's a deer.

If we want to get into the "Aw, it's just a baybeeee!" game then we can set regulations with emotion and say a sandhill crane or wood duck or turkey is gorgeous and shouldn't be killed.

Biology is what matters. The good thing is if anyone does not want to shoot a spotted fawn, just like with a doe or spike or piebald or whatever, don't do it. No one is forcing you to do so.