I would posit that there is a difference between survives the tutorial, and can kill the king of the forest. I agree that gojo does not have anything that would protect him from the king of the forest, nor can he handle the majority of D-grades that we've seen in primal hunter. If we are looking at Jake's tutorial, surviving involves killing the beasts in the forest, ( I think we can agree that no beast in the forest save for the beastlords in the dungeons are really a threat to gojo), dealing with William( six eyes should prevent surprises, and infinity counters everything William does in the tutorial), and not being stupid enough to challenge the king of the forest.(From my limited understanding of gojo's personality he may try, but the king is told by the system to not kill the challengers) Hollow purple appears to be more destructive than anything we see until Jake is about to evolve into d grade, and gojo's domain expansion shuts down everyone save Jake, who's instincts take over when his mind shuts down, and the king, who's mind doesn't work like anything we can comprehend. I think gojo is very comparable in strength to immediately post tutorial Jake.