There are different ways to get representation. One way is to force everyone to vote like Brazil or Australia but this might not be practical in a country like India where elections go on for 1.5 months. But, there are other ways - where you draw a representation of the entire population and make them vote aka Sortition [0]. We already use this concept in juries and other aspects of life. It would be worthwhile to give this a serious try for alternative voting systems.
We could perform alternate experiment systems in parallel and then compare their outcomes to current systems - we don't need to adopt them. But, this has to start somewhere. We could have a debate on "HOW" to draw this representative sample but we should acknowledge that the current system rarely achieves the objective of representation.