Global e-waste in 2020 originates 14% from TVs and Screens. That is significant: https://www.bbc.com/news/business-51385344
From a monetary perspective you may be right if you compare the Chinese junk with the likes of Samsung, LG - they are 2-3 times more expensive. But they are also superior in technology and quality apart from standing by their product for at least 3 years. Prism is competing well on price and Philips is also just slightly more expensive, they also provide a full 3 year warranty.
Also consider that some people don't have the disposable income to purchase a new TV every 18-24 months, they certainly would not expect having to throw out the unit that they were just able to afford with no repair option.
And finally - consider if it is ethically acceptable and sustainable to conduct business this way in this age of time.
Don’t have disposable income to replace tv every 18-24 months but can afford 2-3x upfront cost? How much is the Phillips compared to tcl and xiaomi?
Also, solution to e waste is not buy more expensive so can last longer. Tech moves and keeping something longer means you’ll be leaving out features. A better solution will be to push manufacturers to use more recyclable material and recycling program (trade in credits etc)