Yes. If your business solves a real customer problem and uses "blockchain" to do it, that's great, but you should describe yourself as a tool to solve the problem. If you mention blockchain on the homepage of your product at all, it should be treated with suspicious. It's a sign that you're speaking to investors and fools and not to savvy customers.

One exception: personal projects. "This is an NES emulator that is built in Rust, and it uses Rust because I wanted to learn Rust" is a perfectly good description of a project (but not a business).