The cert is only to get you a bowl of rice outside the working industry.
There are many people who cheat to get their Diploma/Degree cert. Cheat as in plagiarise other people's work without letting your lecturer know. That's why we've heard many cases like 900,000 graduates are jobless.
At the end of the day, when you apply for a job, you have to show all the 'kung fu' skills you have learned in college. Moreless, you should at least know something, but how much do you know?
Having a Degree is better than a Diploma obviously, just like having a Master better than a Degree, depending on what field you are talking about.
I heard from a friend, this A only got a Diploma but he's hardworking and have a lot of ideas, and B is a Degree holder but lack of ideas and always go missing. He didn't get promoted and salary did not increase, all because of the Diploma cert.
Actually, Diploma, Degree or Master cert does not really matter. We all work just to save money, hoping someday we have enough money to run our own business, be a boss someday, right? We also need money to run side business, to get more income.
But if you have the money and 'still' willing to study, why not?