You seem to be very confused that someone doesn't agree with you.
It is okay. It happens.
Give it time, the seam will show trough. You can always feel it with your fingers, and this will show trough the artwork.
This is what you are wrong about.
Options are fine as long as the information provided is correct.
You are providing misleading information.
I will let it drop. You are just not getting it.
Maybe your panel didn't have a seam show off, but that is something that I have seen more often that I wished for, even on professionally build panels.
Now, regardless if the mounting plate would eventually or not have visible seam;
regardless if the novice wants to install a plate or can achieve the top routing;
regardless if the plate is available;
regardless if the plate is affortable;
regardless if the plate is an interesting option.
People have the right of choice, and seeing options is what makes this hobby interesting.