I suppose for people crippled by a traumatic memory it would be beneficial though I'm not sure if that could truly wipe it from your mind with all associated emotions and thoughts. That's why they acknowledge that in the article and suggest modifying emotions or the intensity thereof instead.
How happy is the blameless vestal's lot
The world forgetting, by the world forgot
Eternal sunshine of the spotless mind
Each pray'r accepted
And each wish resign'd