Why does nobody talk about the securities lending market even though it's huge?

I’ve been reading more about how institutional markets actually work behind the scenes, and one thing that surprised me is how big the securities lending market is.

Most retail investors talk about buying stocks, holding stocks, or short selling. But there’s this entire infrastructure where large institutions are constantly lending and borrowing securities between each other.

Pension funds, asset managers, and banks lend shares to hedge funds or brokers, usually in exchange for collateral and a lending fee. Apparently it helps with market liquidity, settlement, and even allows short selling strategies to function.

I found a pretty good breakdown explaining how the whole system works and who the main participants are: [https://stockloanhub.com/how-the-global-securities-lending-market-works/](https://stockloanhub.com/how-the-global-securities-lending-market-works/)

What surprised me the most is that a lot of long-term institutional investors actually generate extra income by lending out shares they already hold.

Curious if anyone here works in prime brokerage or asset management and has experience with securities lending programs. Is it as big of a revenue stream as some articles suggest?