The interesting part of the great strike hypothesis is the question if such even is required for an earth like planet to be tricky earth like - lots of liquid water and an active core capable of sustaining a magnetic field over billions of years.

If this would be the only way that true earth like planets actually form this might make earth even rarer and could mean that most earth size planets within the habitable zone of their host star that aren’t relatively young could be just barren wastelands incapable of supporting life as we know it.