Your 3 years extra warranty is 23% of the cost of the TV. To me it is too expensive and I will not buy the TV at all.
If you are buying a mid or high end TV, 5 years warranty is a must coz basically all tvs have issues nowadays and you want to get the longest warranty possible which is usually 5 years max.
The extra warranty should only be around 10% - 15% of the cost of the tv. If you buy from Sony store their extended warranty is even cheaper.

Many here who only buy cheap tvs will tell you to just throw away and buy another tv if rosak after 2 years. Some will give you examples of their 200 year old tv still going strong. The reality is that tvs are not as reliable as they used to be and issues / failures are a common occurrence. Either get 5 years warranty or just buy a cheap tv instead.

Panasonic tvs are some of the best but not much exposure because not sold in USA where most reviews come from.

Can try to nego or buy warranty insurance outside. I believe there are some companies providing this service.
This is a common tactic where even when the product is discounted, the warranty is still based on RRP which makes it not worth getting.

Where are you buying this by the way? Do you know how much they are selling the 75" MX950?