LEDs are not inherently damaging to the eyes. You may be referencing "blue light hazard", for which evidence is neither rigorous or unequivocal.
Assuming blue light is damaging, white LEDs need not have more blue in their spectrum than other white light sources such as incandescent, fluorescent, and gas discharge. Higher color temperate LEDs with more blue in their spectrum are commonly seen though, as their efficiency numbers are a bit better than lower color temperatures.
I'm not sure what "softer" means. You could mean a lower color temperature (less blue, more yellow), lower output, or a diffuser over the emitters. All of those are commonly used in real LED-based lighting installations.
Assuming blue light is damaging, white LEDs need not have more blue in their spectrum than other white light sources such as incandescent, fluorescent, and gas discharge. Higher color temperate LEDs with more blue in their spectrum are commonly seen though, as their efficiency numbers are a bit better than lower color temperatures.