Voluntary voting effectively gives people with a single-issue obsession more power than everyone else, because they show up to vote. In compulsory voting systems, the outliers are moderated by the median, whose concerns are typically less emotional (abortion, guns) and more economic (price of milk, mortgage rates).

Political parties are a concentrated form of voluntary voting. One of the reasons the USA's primaries system is such a caricature factory is because it's a concentrated form of a concentrated form of voluntary voting.

There are many people who propose models like these and don't think through the end game. The end game is that any party where elected representatives have their votes directly controlled by party members is a party that will be instantly stacked by well-organised single-issue whackjobs.

You like crypto? Too bad, the terrorists use it, vote it down. You're OK with gay marriage? Too bad, Jesus is agin it, vote it down.

Techno-utopianism doesn't solve for the fundamental constraint, which is that people will always disagree. No system can create smooth consensus. What is left is to design a safe, functioning system. Direct democracy's historical performance in this respect is abysmal, which is why we have representative democracy instead.