yes, and not only that reson, but if when you build something, you first build a miniature model of the ship you want to make, so you have a general idea of how you want it to be. and the miniature model, if built to a good mathematical scale, can be used as a base for finding the approximate measurements of the dimensions of your ship in every major section of it.
i did that before i started building Mega Exelion.
so, i have that tiny little ship model that helped inspire me to build this
say hello to "Mini-Exelion", 35 meters long, 1/10th the scale of Mega Exelion

After I built Mini-Exelion, I went on and started building the framework for Mega Exelion, using the mathematical benchmark of Mini-Exelion as a guide.

So yes, building the structural frame of your ship before anything else really speeds up construction, cause that way you can know where everything needs to be.
I look back now at when I built the Space Battleship Sunset initially a year ago. I never really laid down a frame for it, so there was a TON of major trial and error in its construction. Here I am a year later, having never started out with a structural frame for it, and I have yet to still finish it.