From new user perspective, they don't know they even need a separate service for that next to green wallet.
If you're a new user and get to block stream page, you're kind of lost.
Discussion
They do explain how to get l-btc but it's a bit technical and outdated. L-USDT is relatively recent compared to the shitcoin networks so not much info and usage yet. https://help.blockstream.com/hc/en-us/articles/900000630846-How-do-I-get-Liquid-Bitcoin-L-BTC