Earlier quoted context omitted.
You could say that just about any software development platform. If it makes building software easier, it makes competition easier. And if building apps is easier, it really doesn't matter what stack your app uses - it's going to get easier to "clone", so you may as well use whatever platform gives you the best results. Other than that, you could either make your business, rather than your technology, more competitiv…
It's not that client-side applications are easier to reverse-engineer. If the application is all client-side, it can literally just be downloaded and reused by a would-be competitor.
Microsoft Word is entirely client-side so it too can literally just be downloaded and reused by a would-be competitor.