In some cases, most definitely.
To give a simple illustration: The law in your state may require a written contract for the sale of goods over a certain value. Or for that matter, you might choose to give your parent a power of attorney to sell something on your behalf whilst away on holiday. It does not require specialized legal knowledge to compile a bill of sale for a motorcycle, automobile or other goods or to draw up a limited power of attorney.
Similarly, a young person without a lot of assets may want to draft a last will and testament or a living will. For many young people a conventional legal template can be used to make their files and the forms can be downloaded free from the web, without incurring legal costs. Of course, it’ll be a different case for a billionaire with several assets and a complex will where consultation with a legal or financial expert is priceless.
Many parents recognize the need for a medical consent form for a babysitter in case of a medical emergency. Or they might need a broader temporary guardianship form when their child will be staying with a relative or trusted friend. These sample forms are freely available online.
Free legal documents are particularly valuable when they’re also accompanied by legal guidelines on how best to complete them.
Even though the law recognizes oral agreements, it always makes sense to get it in writing to avoid arguments over what exactly was agreed upon. Applying sample legal documents to compile your own contracts is not any different to lawyers using their existing templates for standard agreements.