This isn't a measure of front end development skill and every dev on the planet knows this. It's a marketing pitch. Hand coding and front end development are highly paid skills that takes years to master, Webflow can't replace it, sorry.
Can you spit out a site in Webflow that is responsive? Sure. So what? I can use a tool like Bootstrap Studio and make a site even faster then I could in Webflow with more breakpoints that uses Bootstrap 4. It's not a measure of skill, it's just a measure of being able to use a piece of software.
Do a quick search on job boards (Indeed, Dice, Authentic Jobs) and query the results for Webflow. Nationwide in the US, less then 100 results are returned, and all of those jobs have skill requirements outside of Webflow, primarily HTML, CSS, JS and a server-side language.
The only real path to take as a Webflow Designer is the small agency or freelance route. Don't believe me? Ask these same questions on other forums like /r/webdev, /r/webdesign, stackoverflow, Hacker News, etc.