I don't think a degree is absolutely necessary for the coursework, you must do the 650 hours minimum study, plus your flying training.
I was told that a frozen ATPL is equivalent to a Bachelors & a full ATPL is equivalent to a Masters.
The only time you appear to need a degree, or degree level quali, is if you need that £25,000 loan to help you on your way (as I am doing). The banks will help fund your training through a post graduate loan, I am with HSBC & they need a degree as part of their points descision criteria.
I have a degree level quali in Hospitality Management & got the loan agreed in 20 hours, the quali helped.
If family members are willing to fund training, you don't need the degree.
You are young so if funds are no problem follow your heart, you can retrain in another industry later when you need to be responsible if necessary.
It is up to you.
Good luck with your flying.
FB