1: It takes time to rent a house.
Now there are basically classes in the morning and some self-study in the evening. Going in and out of school every day will waste you a lot of time.
2. It costs more to rent a house.
Generally speaking, the living expenses of college students are 1000-2000. Renting a house will waste half or more of your money. Others can only live their daily lives and won't save any money. In case there is another problem that needs money to solve, it will be another trouble.
It is not safe to rent a house in school.
You are likely to encounter wrangling with the landlord and neighbors, or you will be exhausted (individual phenomena). If there is any meeting at school at night to make up lessons, it will be very late to go back. This is also a very unsafe factor. Because you don't know what the residents near your home are like.
Of course, if you really can't get along with your roommates, renting a house is also an option.