Apathy reduces suffrage. Making voting difficult contributes to apathy; this section addresses it.
Red tape when people register or vote makes it harder for us to achieve our goals as a nation.
Section 1 addresses some other causes of voter apathy like private financing of campaigns and unreliable or unavailable self-governance information, keeping confusing or disheartening false information from drowning out or contradicting accurate but underfunded information.
Seeing corruption in the process also increases apathy, reducing turnout.
This amendment strengthens enforcement. Section 3 addresses indirect abridgment in districting and apportionment. With its safeguards plus the abstention option 95% suffrage is a realistic expectation even without mandatory voting.
The argument that most people often vote by habit for incumbents, party lines, or at random anyway fails not because it's not true - it is true - but because it misses the point. It may be true when an office or issue doesn't especially affect that voter or when no candidate has that voter's confidence. It's less true when an office or issue means something to that voter. More competitive elections and nonpartisan districting will keep issues and possible solutions in the public debate, reducing voting by habit.
And no vote is without effect...