You are ignoring all of the advantages of writing a web client. Are you really saying that distributing a native app for every platform is better than writing something that uses the browser?
Web devs are in full control of their whole stack (excluding the browser where you occasionally need to account for incompatibilities), have to maintain only one version of the app (no upgrade needed on client-side), are not constrained by the platform owner's policies (app store tax).
Yes, it's more limited than native technologies in other ways, so it's not an answer for every problem.
Distribution aside, its more likely you only know web languages and THATs why youre coding your project on the web stack. Pick the best tool for the job