I had a class where the teacher did something similar, but she showed that if you started a ROTH today and contributed only the 4 years you were in college and then stopped forever. You would have nearly the same amount of money as someone who started 1 year after they completed college and invested every year until retirement.
Ultimately she was encouraging us to take out student loans and invest it or use any excess scholarship money to max out a ROTH IRA. She even advocated for investing all student loan money and opening credit cards tp actually pay for college, making minimum payments until graduation. Then moving away to a LCOL country and learn the language for 8-9 years while remaining in school taking 1 online class a year and travelling the world on student loans and not to worry about starting a career until 30 and start paying once you are back and start a job.