Because development has high upfront costs. You need to build something before you can collect any money. That means lots of expensive engineers. When building

Because development has high upfront costs. You need to build something before you can collect any money. That means lots of expensive engineers. When building is nearly free (free money now at expense of tomorrow’s cash flow), you build things to sell tomorrow. Businesses of all sorts get loans when the rate is good. It’s a business cash flow thing. Look at the SEC filings for all big tech companies. They discuss their billions in debt.