No, it's not.
> that packages get lost sometimes or the UPS driver might drop your TV.
I would never leave a bad review for those types of things, since they're not in the sellers control. I'd knock a star off if delivery was delayed because it didn't ship on time though, which has happened on more than one occasion.
That's the point! You don't knock a star off a product because they didn't ship the product in time. You knock stars off the SELLER. There's literally a whole system in place to review the seller.
And if the seller is Amazon, it's even worse. Why would I care about whether or not Amazon was able to ship your product in time 3 months ago?
> Why would I care about
As I said, the world (Amazon, manufacturer, potential buyers, etc.) is lucky that I took the time to provide them with the opportunity to consider my opinion in the first place, so I'm certainly not going to take additional time out of my day to leave a secondary review, and I'm certainly not going to concern myself with what others care about my honest reviews.