Hotels should be governed by same contract law as all other businesses

Why should hotels be exempt from laws that governs good business practices

Example I booked a room 9 days before the date I needed it but cancelled within 24 hours giving the hotel 8 days to resell the room.

I was charged 80% of the fee and offered nothing back if the hotel manages to resell the room. The incurred no costs and therefore this charge is grossly unfair.