As you’re defining it, the most scientific science perhaps starts out that way, but its utility generally grows over time. Think about chemistry - we probably knew about the existence of atoms and elements and the difference between them all for years without having practical applications for it. While this was going on, our understanding of human biology was also growing, to the extent that we realized our bodies are made up of precisely the same elements that we find elsewhere in the world. There’s iron in the rocks. There’s iron in our blood. How is this relevant to anything? Nobody knew for awhile. But eventually, our understanding of elements in chemistry and our understanding of human biology allowed the field of bio-chemistry to develop. Today, what we learn about chemistry can easily be considered in the context of human biology, and vice versa.
But consider something - as our understandings of chemistry and biology advanced to the point where we could use knowledge in one field to apply in another, was that making things “less scientific?” What, precisely, is “less scientific” about accumulating knowledge in various disciplines to the point where we can actually apply it to solving real world problems (like in medicine, for example)? Doesn’t this argument seem backwards to you?
There are plenty of scientific disciplines (theoretical physics, for example), that regularly produce theories that, even if true, seem a bit starved for real-world applications. But I don’t know anybody who actually organizes their life around the assumption that, say, the Multi-verse is true. I don’t even know how one would do that, even if they wanted to.