Something else that's very popular is income protection insurance (called disability insurance in some countries). The plan pays out a monthly income if the policyholder is too ill or injured to work and could continue payout all the way up until retirement age if the policyholder can never return to work (think Parkinson's, for example).
This isn't a pilot specific insurance but the good plans cover the policyholder for their 'own occupation', making it occupation-specific. I think a key benefit of income protection over loss of licence insurance is that you don't need your licence to be revoked or suspended to get a payout, you just need medical evidence from a doctor/consultant that you're not well enough to work. There are plenty of scenarios where your licence might not be suspended but you're too ill to work.
Tom