This is just my personal experience, but I think it reflects a larger issue. Younger people were not 'too inconvenienced to actually go out and vote'; they wanted to support the party that they felt aligned most with their values, only to be ignored and betrayed in favor of the DNC's neoliberal matriarch.

Back in 2016, a group of us, mostly young people, caucused for Bernie Sanders. We had a strong turnout, with more people in our group than for any other candidate. The next largest group was for Hillary Clinton.

The people running the caucus seemed to have their own agenda. They told those supporting other candidates that their choice was "nonviable" and that they needed to switch to a "viable" candidate. Then, they physically ushered them to stand with the Hillary group while they [the staffers] "figured things out". Many of the attendees were first-time caucus-goers, so they didn't know any better and assumed the staffers were just being helpful by directing them.

For those of us who had caucused before, it was clear what was happening: the staffers were trying to inflate Hillary’s numbers. When we tried to speak up, we were told not to interfere or risk being removed.

It was obvious to us that the DNC was working against Bernie, ensuring the nomination went to their chosen candidate. Even Trump acknowledged that Bernie would have been a tougher opponent to run against.

There are plenty of reasons young voters don't vote as often beyond laziness. Frequent moving, inexperience with the process, lack of knowledge of when primaries happen, ignored by campaigns because they don't have a history of voting, etc.

But yeah let's just call the kids lazy. I bet they should get off your lawn and stop smoking pot, too.