Earlier quoted context omitted.
And if that happens, take note of which political parties/groups fight tooth and nail because they know that voter turn out is bad for them. (It's not difficult to predict.)
Isn't too much voter turnout bad though? Do we really want every poor ignorant impoverished (or rich) American voting? Or just the people that take democracy seriously and vote after having puzzled it out? If you reduce the friction too much (or even force people to vote) you'll get a lot of voting based on who promised the most goodies/handouts or emotional appeal rather than rational reasoning.
To answer the question, yes. You absolutely want every single eligible person in the electorate to vote.