It's a disadvantage for players to be too good at boss fights, because those good at boss fights are more likely to beat that big ant and continue on into Hunter's March before even exploring the Marrow fully.
Even people who climb up before going right first and so come to the big ant guy from above, if they get scared off by that one's difficulty level, have a chance to find Forge Daughter, the floaty cloak, and dash/silk step...