I don't think berserked games need increment however the arenas set up by lichess could have increments for the players who choose not to berserk.
Those who berserk take a risk and if they lose on time because of it, that's part of the risk they chose.
Having pretty much all the arenas set up with no-increment means the only option, if you don't want to end up in a flagging contest, is not to play in the arenas at all.
The rapid arena is 10+0. Maybe 10+2 or even 10+5 would be better. Or even 8+5, with berserkers playing 4+0.
Those who berserk take a risk and if they lose on time because of it, that's part of the risk they chose.
Having pretty much all the arenas set up with no-increment means the only option, if you don't want to end up in a flagging contest, is not to play in the arenas at all.
The rapid arena is 10+0. Maybe 10+2 or even 10+5 would be better. Or even 8+5, with berserkers playing 4+0.