Nah. It just gets you to all the places. That would be akin to calling a car an everything store. You get in the car to go places and do things, but the car isn't the place or thing. You can have a direct connection to a website or app that doesn't go through a browser. Likewise, you can directly call a business to connect and interact without a car. The browser is the vehicle. The internet is the street.

Yes, that is pretty much how WeChat works. It is mostly a glorified messenger and payment system (like current whatsapp), that they added a proprietary webbrowser with addons and storefronts on top (and wechat gets commission from said webpages and addons people access through them).
You could maybe get a similar experience in Android if you install Firefox, save a bunch of commercial websites as favorites, save another bunch of social media websites as favorites, add whatever addons there are (ublock origin for the win), and access stuff only through it.
Voilá, now you have an everything app.