I blame Apple. No, really. When Robinhood first launched it was intentionally targeted at iOS users, hence the almost automatic focus of building an app vice a mobile friendly progressive web app. Then the push to target Android users - but since "we do apps" is already the corporate mindset, the next thing is not a web page, but yet another app. Eventually they get around to the web.

A company I left a few years ago went down the same path.