If you are going to chose between people being lazy and not having time to stand in line for whatever reason and you are talking about Americans, I will go with lazy.
The bottom line is that it wasn't important enough for these people to make arrangments to vote. That is on them.
It's basic, if Floridians don't want to stand in line election after election, they can change their voting laws to mirror the systems that work in other states to prevent that necessity. However, this sitting around complaining for a short period before and after elections AND absolute inactivity on the issue at the times they could be fixing the issue, exposes them to charges of laziness and apathy.
Complaining about something that can be fixed with a little effort, and time and again are left unaddressed instead, is the very definition of laziness. At the very least it's one of those "made your own bed" sort of things.
The same is true nationally. Every election we rail on about voter fraud. Then the election season concludes and we seeminly forget about it until the next election. The time to address these issues is not right before, during or right after an election, but during the off-season.