Why are radiated emissions standards for consumer electronics different from industrial?
Because consumers have more devices like TV's and radios and they are more susceptible to noise than industrial or commercial equipment (and more likely to complain). Industrial environments are especially noisy (especially any with large switching voltages or large power feeds). This makes it easier for me to pass FCC standards with the products I make because I register them as class A.
Wiki:

The emission limits for Class B devices are about 10 dB more
restrictive than those for Class A devices since they are more likely
to be located closer to radio and television receivers.
Source: https://en.wikipedia.org/wiki/Title_47_CFR_Part_15