The more realistic lesson is don't apply programmer logic to legal contracts where the courts will apply reasonableness tests, side with the landlord, and stick you with a many thousand dollar bill.
It's like how pricing mistakes on websites are in the consumer's favor when they're small but in the sellers favor when they're large because it's unreasonable to assume someone would be selling a $450 item for $4.50.
If an idiot landlord gets into court because a tenant took their contract literally, they're a fool who has hopefully learned a valuable albeit very expensive
lesson about writing contracts.
It's like how pricing mistakes on websites are in the consumer's favor when they're small but in the sellers favor when they're large because it's unreasonable to assume someone would be selling a $450 item for $4.50.