Wholeheartedly agree! I learned more in my first 6 months in Big4, then I have in this last year in my banking job. Industry jobs can be very "monotonous" and "routine"-like. You basically do the same thing day in and day out and only learn what is required to perform your job adequately, nothing more.
Additionally, the social aspect of Big4s is much better than in banking (at least pre-COVID). I'm quite introverted by nature, but I was positively surprised by the amount of socializing/network I did there, simply because the company culture encouraged it. In my current banking job, I could go weeks without Skyping/calling anyone if I wanted to because this team is quite anti-social. Again, Big4 also had some questionable employees, but I find people to be overall more pleasant to deal with. Sometimes I regret leaving the Big4.