The answer to your title question is no. A $3,000 gun with the adjustable features you need to get an acceptable gun fit a for a consistent mount and your preferred POI will post the same scores as a $20,000 gun.
Comparisons to car and boats is just nonsense in regards to that. They have inherent performance variables. A gun is like a hammer whether it's a $5.00 hammer or a $35.00 hammer you still have to hit the nail.
Now beauty, quality of materials, durability, prestige/satifaction of ownership, etc. are different discussions and aren't what you asked about in you title but can be answered to the different question you posed in your post.
Comparisons to car and boats is just nonsense in regards to that. They have inherent performance variables. A gun is like a hammer whether it's a $5.00 hammer or a $35.00 hammer you still have to hit the nail.
Now beauty, quality of materials, durability, prestige/satifaction of ownership, etc. are different discussions and aren't what you asked about in you title but can be answered to the different question you posed in your post.