This is a wise move. Moving to France would have seemed a great idea at the time. But it would also have made dealing with his central problem more difficult, in a foreign land, and one where English isn't the first language.
There are no new reports of actual drink-related issues involving Guildford, who has described himself as an alcoholic. This is the most famous of the addiction diseases, a condition that often involves fear-based personality problems entwined with the more obvious drinking disasters.
Those who work in the recovery industry know certain signs all too well - one of the addict's instincts is to do so-called "geographicals", scarpering off to a new place believing that running away will automatically bring contentment and a happier life. It virtually never works.
Clermont Auvergne coach Franck Azema said wisely and compassionately: "Throughout this season we were at his side...unfortunately the weight of the remoteness and fragility were too important barriers.
"We will keep in contact with Zac and can only wish (he) finds all the stability and support necessary to help him find the right track (and) serenely continue his career and his life."
One of the problems Guildford may face is society's battle to understand alcoholism, and come to grips with the idea that it is a disease. It can be a long road for any addict to find a serene recovery, and while New Zealand rugby tried to show support, they couldn't carry it through when a rapid fix did not arrive.
Addiction, with its genetic base, is known as a family disease, and it is also one of denial and misunderstanding. The issues are not just about substance abuse - putting down the drinks or drugs opens up a whole new and difficult world to deal with.
Even now, with coach Azema's wonderful words to help smooth Guildford's passage home, many will still remember or view Guildford as some sort of selfish troublemaker.
He faces an uncertain future. But he always did, and it's best he deals with that supported by family and friends.