Absolutely nothing. You and that individual are two different persons. They could have put down something like volunteered at the RC for 3 years and been a M'sian Chinese, you could put down exactly the same thing but being an Indian National. Due to your countrymen who came before you, it's likely that ICA would give absolutely zero credit to your app. Why? Because most of your countrymen who came before you, all did the same thing and as soon as they got their PR, they never bother to continue with volunteering because they were only abusing the system, and absolutely nothing altruistic in them at all. Just doing it to get something.
Basically, what I am trying to say is all application are based of a composite of scores for each item on the application. So may be a plus on one app and either neutral or possibly negative on another. Different weighs are given to each section and those weights might be skewed based on race, religion, gender length of time on EP, how many children, etc., etc.. We don't have a clue other than the fact that the composite scores are not based on a list of point for this, but more like points for this IF/OR/AND comes into play. That is why we keep harping one this. Malaysians can get EP for $2600/mo salary but you cannot.
I've been on this board for 15 years and moderating for probably 13 of them. We have seen cycles where the point spread has been tweaked to either allow more of one race or less of another be successful or unsuccessful. From a period from short after the 2011 GE until about 2 years ago, it was damn difficult for any Indian to get PR here due to the abuses by Indian Nationals in the Banking and IT sectors who'd managed to get into HR Mgmt positions and then hired ONLY Indian Nationals, to the exclusion of any other nationality/race. When this came out the Political Party in power lost a lot of votes in the GE (they still won but the writing was on the wall). So, the pogrom against Indian started in full force (The other reason was that during the run-up to the millenium the country imported '000's of Indian IT programmers as Singapore thought is was going to crash at the stroke of midnight on 2000. It didn't happens, but the demographics that the government was happy with was skewed by two percentage points raising the Indian population from 7% to right around 9% of the population and the majority Chinese dropped from around 77% to 75%. The government has always used immigration to keep the demographics in the balance they want. With a TFR here of only 1.13 they have one of the 3 lowest TFRs in the world. So keeping it balanced with immigration is how they keep it all in check. So, the whole thing is build on a playing field with movable goalposts. Don't know whether this helps you or know.
What I normally say, just buys your ticket and takes your chances. Just hope the train doesn't fill up before you can get on. There is nothing you can do other than lying on your application and that will be found out (that's why most applications now take between 12 and 18 months for Indian Nationals and one or two other Asian countries).
Life isn't about avoiding the bruises. It's about collecting the scars to prove we showed up for it!