In some states, no, but in others yes. The majority of people buying a home do not use the services of a real estate attorney - but all do in Wisconsin. Even real estate lawyers admit that attorneys usually are unnecessary. Most home buyers are capable of handling routine real estate purchase contracts as long as precautions are taken. You should definitely make sure you understand every single term of the contract.
Every contract is different, even though they're on preprinted forms.
Buyers should closely study the contingency clauses which allow them to back out if they cannot obtain financing or an inspection turns up problems. Hiring an attorney after a conflict erupts may be too late. Lawsuits are costly and time-consuming. And it's important to find one who will help, rather than hinder, the deal. Buyers who need an attorney should call several and inquire about fees, but be willing to pay for someone with experience.