> Nobody would use whatsapp from the browser on their phone, or Instagram, or TikTok, would they?

I would if those apps didn't intentionally make the web version worse than the app. There was a small amount of time where TikTok was under scrutiny from the US government and not available for download. Somehow, during that time the website worked just fine, but once the deals were signed and the app was available for download again, somehow the app became too complex to work on the web. Funny how that works.