I don’t believe that’s a law of nature - honestly it doesn’t even make sense. Disrupters disrupt what they can, what yields them the most profit.
Christenson is the one who coined the term “disruptive innovation,” and he gave it a precise definition. That definition includes taking on low-value markets and gradually expanding into more lucrative, higher-value markets. The established players flee upmarket, ironically making some of their best profits as they do, and are eventually squeezed out entirely.