Lawyers have many uses and you might need to consult one, but to simply purchase life insurance you should not need a lawyer’s assistance. However, if you look over your insurance, you may realize that you need a lawyer to assist you. Their professional voice can be very useful if you need to do something such as write a new will or revise it.
You might also need a lawyer to provide their assistance in creating a trust or in something such as an estate tax evaluation and plan.
If you plan on arranging for business-related insurance, consulting a lawyer would be highly recommended. As trained professionals, their advice and assistance could be extremely valuable.
Under normal circumstances, however, you as an individual should not need a lawyer to purchase life insurance for yourself.