Thank you, it all makes sense now.You can quantify something without facts and figures. You can use your thinking, analysis and opinions to back up your claims.
Context is great (for instance how many days you had for a deadline, how many people worked in your team, how much budget you had to manage) and often facts and figures can help to bring that context to life. But the interviewer is really looking for what YOU did - your decision making/your efforts/your input rather than the numbers that surround the circumstances. That is actually what is important.
With questions like when you failed or when you were in a difficult situation, the facts/figures for context can still be used. You still need to provide the context of why you failed or why the situation was challenging. But the interviewer is far more interested in what you did. How you overcame the challenge/How you dealt with the failure.