Compulsory voting is more democratic. The USA should make voting compulsory!
Ditto with the brexit referendum! If only they made it compulsory, brexit would have probably not passed (presumably many people just didn't expect brexit to win, and so didn't bother going to vote).
Have you heard of the term donkey voting? null votes in Australia are about 5% of total votes (federally) https://www.abc.net.au/news/2016-07-04/informal-votes-to-hav...
Also it's only sorta compulsory in a sense, you can just never register and never have to vote. but if you do register you will get fined if you don't vote. the amount of unregistered voters is about 4% of the population. so at it's worst it's atleast more representative then some other democracies.