Nonsense.

Gve me a proof and source of reading material for what you said.
If not it is just your own placebo effect that doesn't have any standpoint at all.

No matter how good the upscaler, the image will look slightly softer than play in its native resolution, this is a fact and limitation of LCD technology.

Not everyone watch video from Netflix and Amazon, how about those who watch Astro?

I'm not going to oppose everyone to buy full HD TV rather than 4K since manufacturer made us no choice by categorise full HD TV as low spec TV nowdays with trimmed functionality, but it doesn't make the fact of ugly to become beautiful.

I personally own a 60" full HD TV and hell no i will upgrade to 4K TV unless my current TV is dead and left me no choice.

4K and HDR still need more time to become a widely adopted resolution, and clearly is not now.