What’s wrong with margin?

Okay so before people reflexively answer, I understand the fundamental risks with investing on margin. I know what a margin call is, and I know when or how it happens. I also know that if I ever needed the money, I could sell at a wider loss while also paying interest.

But if you can borrow at 2.5-3% to invest, why not do it? As long as you have a balanced portfolio of high quality stocks, the risk of a 50% decline is extremely low. The largest drawdowns in history were around 50% IF you bought the top. So if you’re investing in a 15-20% drawdown, the chance that your investments go down another 50% is so low it might as well not be considered.

So what exactly is the risk if you’re investing responsibly? Your investments should yield more than 3% so if you can borrow at that rate why not do it? Please give real answers to this question and not “lol noob, get ready for ur margin call!”