This is so disingenuous and untrue that I‘m close to calling it an outright lie. Development of UI has never been easier, more accessible and better for the disabled than with web tooling. Any businesses from tiny startups to gigantic corporations can build value creating applications which generate billions of dollars of revenue which runs on almost all devices, using just one language and one code base. Browsers HTML and CSS parsers are incredibly generous in what they accept, allowing small markup mistakes in a latest update to not grind your operation to a halt. Modern HTML and CSS are dead simple to use, deliver sane defaults and capabilities which most browsers understand all the same. Never before has it been so easy to develop an application for your business with a language and frameworks millions of developers speak. Prototyping is incredibly simple. Modern browsers deliver incredibly tight sandboxes so malicious applications can neither access the information of other applications nor anything else on a targeted users system. Fake applications can be identified with SSL certificates in ways native applications never could.
The web enables the famed „write once, deliver anywhere“ which native desktop always aspired to be. My apps run on android, iPhones, MacOS, rare Linux operating systems, Windows and Tablets alike. The only thing they need is a browser. I only need one programming language for this.
One developer can do with the web what 10 couldn‘t do with native. How one could take a look at fortune 500 companies which are almost all at their size in thanks of the web and its advantages and then go on to declare the latter the worst platform to build is beyond me.