I think the ‘point’ of the ship of thesius is often missed. Grouping things together to be one entity is thought process done in our brains for ease of understanding, but it doesn’t exist in the real world.

I think the ship of thesius thought experiment is there to show that there are times where things can’t be distinctly grouped. When things don’t fit nicely into groups we shouldn’t force them, but abandon the that grouping as it isn’t applicable to the situation.