True - although in certain ways, this can be an advantage. When I've built SVG components, I use viewbox with height and width constants to define the SVG's "internal" dimensions, and then if you want to do something like finding the midpoint, you just do the right math on your constants. Then, the component can easily be scaled via CSS.

The problem, of course, is that there's not really a good way to do dynamic sizing if you want to be able to change the aspect ratio, which is where layout engines like Grid and Flex become so useful in HTML / CSS. But in my (fairly limited) experience, if I'm reaching for SVG it's because I need the tight control that comes with it, so it hasn't been an issue for my own projects.