By that same line of argument, there are myriad ways to be progressive but only a single way to be conservative. Which is really only true theoretically. In practice, most people who identify as conservative actually have very specific policy preferences for how they want their society to evolve. But at least the way the word is used it has an intended meaning like this.
I mean heck, with the right parameters and conditions doing things like rolling back regulations and appealing to traditional values is progressive. For example look at the advocacy of Strong Towns, who in (very) broad strokes are pushing for a return to more traditional urban development patterns in order to help cities return to safer and more financially sustainable models. If you had a mind to do so you might define this as conservative progressivism, which isn't really a contradiction at all.
Traditionally left and right were not "economic" terms. They were the revolutionaries and the monarchists. And the idea that economic politics as separate from other kinds of politics I kind of reject too.