I think the right to be forgotten is spelled out in plain terms. If you have my data, and I don't want you to have it, that's the line in the sand. With a few exceptions (such as data decentralization), data is trivial to delete. The problem is that businesses and governments don't want to delete data, because data is knowledge, and knowledge is power.

Example: You are a typical business. A fire completely destroys all of your data, including financial data. If the IRS comes knocking for financial records, you have an excellent reason for why you cannot provide it - force majeure. A law protecting the right of a human to be forgotten should be treated the same as a fire. You do not question it, and should forcefully comply.