I'm not worried about the connection between the mount and the wall - I do know how to do that properly. I'm worried, in this case, about the connection between the TV and the mount - specifically, in this case, a 65" TCL 65R617 TV with a Sanus VLT6 mount.
The wall mount came with spacers to use in case the back of the TV isn't flat, which as you can see in the first attached picture were necessary. Specifically, I used 7mm worth of spacers. (The screw holes on the TV are quite shallow, and the margin between a too-short screw and a too-long one is only a few mm. None of the screws that came with the mount were the right size, but I found something at my local hardware store that works as long as I add a couple of extra washers.)
My concern is this: The full weight and pressure of the mount/tv connection is not against the sturdy metal inner frame of the TV, or distributed evenly across the back of the TV, but rather focused on a small amount of rather flimsy-looking plastic around the screw hole. You can see what I'm talking about in the pictures. It feels like if I tighten the screws too much, I'll crush the TV's plastic frame. And as soon as I hang the TV, its full weight will be on those four small weak points. Is this really secure, and is it how this TV is meant to be mounted?
The gap, requiring the use of 7mm spacers:
The plastic spacers against the plastic frame of the TV - a weak point?