In a nutshell, because you cant find more affordable life insurance elsewhere.
Insurance companies like most business operating today are finding that the easiest way to reach new consumers is online. People don't now want to make an appointment to see their bank manager or insurance agent. They want to be able to find competitive quotes online and Life Insurance Companies understand this. Their business models are now built around expanding the online presence, whilst reducing branch costs. This means savings to you, the consumer, through cheaper insurance premiums. It therefore makes sense, to save time and money, to buy term life insurance online.
There is confusion about what exactly term life insurance is.
Term life insurance as the name suggests, runs for a limited period, or term. At the end this specified period of time, or term, the life insurance expires. Hence the name, Term Life. The policy is effective for the length of time of the policy. Therefore the insurance companies risk is reduced as they are only providing the life insurance for the specified time. As this risk is reduced, so is the cost of the cover, compare term life insurance quotes and see for yourself. Many people use this type of life insurance to cover a debt, e.g. a mortgage or bank borrowings. It can also be used to top up the amount of life cover or for families just starting out.
If you don't want the hassle of having a medical exam or are worried about the prospect, you should not let that put you off. Many companies will provide term life insurance without the need for such an exam.