Why is there just a random hole in the Biolizard arena that kills you. That's just unnecessary.

This isn't a roleplay account I just chose this name for the novelty of having it. You can call me BackSet (or Zinnia, if you want) and I love Pokemon, in particular ORAS. I'm an adult.
Why is there just a random hole in the Biolizard arena that kills you. That's just unnecessary.
hate to say it but thats where the biolizard takes his bio breaks so alas it is necessary