While this is generally true, the programs used to create assets are also becoming more and more powerful. Programs such as AwesomBump can take a single image and output a series of textures, albeit, those textures are false/guessed, such as generating a height map from image brightness, or figuring out and AO map based on color variation. However it can give realistic looking results in a matter of minutes if you know what you're doing.
As deep learning gets better, I imagine we'll get programs that can generate realistic PBR textures simply by guessing what your object is.
Check out the videos on this page; it'll give you an idea of how powerful some modeling programs are currently. I think some time around or after we hit that wall of "can't get more realistic" we'll probably see the ability to create assets with absolutely trivial levels of work compared to today.
Visited this page and was surprised to see here a picture of Alita in her Motorball body (manga version)
Enlarge the screenshot or go see for yourself: https://www.foundry.com/products/modo
Depends on the quality of what you want present, SketchUp modeling is really simple but very limited on what you can accomplish.
AutoCad can be very precise but its a lot more difficult, and expensive as hell.
If you want to make realistic presentations of how the furniture will look like, have powerfull modeling tools and not have a huge hit on the budget, i would recommend MODO. There are plenty of videos all around to learn it, but if you want more scructure maybe you should look into Digital Tutor's training videos. Or if you dont want to spend anything, Blender.
Hey, I think the most effective way of going about this would be to get some one to show you the basics of modo in some one on one sessions but the buy the rigging master tutorial, https://www.foundry.com/products/modo/paid-tutorials/master-character-rigging
It covers exactly this kind of info and you can go back and reference it when needed.
If you want a go at learning the basics on your own then these new tutorials seem really good and free.
I'd give these a try, then get on the discord channel and ask for help where you are stuck. If you really want some one on one after that, there are loads of peole that will be happy to help.
Have you tried MODO yet? It's for video games but there are a lot of soft goods designers that use it for it's sculpting capabilities. It has GREAT rendering capabilities and can spit out OBJ files for slicing.
There is a free trial of the software. MODO
I wouldn't use anything parametric. That will be a real pain. I am no footwear designer but I've asked this question to some and they point to Blender and Modo. I've designed shoes and I used Blender for modeling and textured it in Keyshot. You can check out the model on r/ProductViz. I put it there pretty recently.
I'm lucky enough to have a filthy man-cave and I'm planting a jungle in my garden. I'm also learning to use the Godot Engine (Open source) and the 30-day trail of MODO. :O]