Investment banking - not rocket science

hi everyone, I recently read a money diary and it really resonated with me. “I moved to London nearly six years ago, straight from university. I was hellbent on independence post-graduation and my rationale at the time was that if I didn’t know what I wanted to do, I might as well get paid as much as I can while I figure things out. As it turned out, the banking job I landed out of university wasn’t nearly as bad as I thought it was going to be, and I’ve stayed in the industry ever since” .I was just hoping to hear from people in the industry about their thought on this? (dot)refinery29(dot)com/en-gb/money-diary-finance-200k. Also I bought the ibanker book and in there he says” I’ve worked with people you’d never in a million years think had what it takes to become an investment banker. I’m talking of people who’d cringe if they were given the bill at a restaurant and asked to calculate what everyone owed; people who, before joining, had never heard of the likes of Lazard, Tata Group, McKinsey” I feel like this is me, I’ve started brushing up my math skills but I have never been number minded I.e my C in GCSE maths