Why just the browser? It's just the tip of the iceberg. The real deal breaker is that you can't sideload apps. I know it's a good device for its target audience

Why just the browser? It's just the tip of the iceberg. The real deal breaker is that you can't sideload apps. I know it's a good device for its target audience, but personally I'm not buying anything without a possibility to adjust it to my needs. Doesn't matter how good it is out of the box and maybe I won't even be needing to adjust anything, but I need an option to do it in case I change my mind later.