Yeah, people thought it was not that serious.
And what do we see afterwards? The game got taken down permanently.
And thats what DMCA does if violated repeatedly.
And its only because Microsoft targets games (and mods) that could ruin Minecraft's reputation.
And why? Because they have a deal with Child Safety Act.
Lovely Craft Piston Trap is a Minecraft Porn Parody, and Microsoft want to avoid children from being able to see porn or lewd stuff of Minecraft, so they issued a DMCA to prevent that.
Furthermore, people have been using Tracer.ai to trace that game back to Microsoft.