Fusion seems legit to me and it’s free for non commercial use. It seems more intuitive than other cad software though they all have a learning curve
I found fusion360 and blender to be best for me. Fusion made by same company as tinkercad.
I tried freeCAD and had constant errors (like 20 at a time) and couldn’t figure out what was going on even tried googling. And that’s when I learned that’s just how it goes with that program.
I like blender to make sculpted models. Tutorials and figuring things out myself was frustrating but now I have a decent grasp on the basics and I find it much easier to use and keep learning new things all the time with it.
I’ve only used fusion for a few projects that required it and had to rely a lot on tutorial videos but I was able to do the modeling. I plan to learn more of it in the future but it’s pretty decent so far.
I’ve not used any of the others you have listed.
Well yes and no. I think mostly it’s up to you to determine if the model is good or not. .here is an example.
I wanted to make a model and I needed a female face. (A mask). I found one in creative commons. When I attempted to use the face/head model I realized it wasn’t symmetrical. Or level. And had weird internal geometry.
I fixed those issues before I could use it for my mask model.
I figured since I did all that work and it was a nice female head, I would upload it on thingiverse so that others wouldn’t have to do through all the same trouble.
But I don’t want to just print a female head. I didn’t need one. So I didn’t. There is no photo on that upload.
It’s not really necessary.
I did, however, print the mask I made and posted photos of it with the model.
I hope my example illustrates why enforcing the photo rule isn’t going to work in all scenarios.
Just fyi. On makerworld.com, in order to upload a profile file (a pre made print file), you are required to use a photo of the model.
I think it works as a rule for that.