I don’t, because you are wrong about heat. Heat matters to everyone. If heat didn’t matter on regular timescales graphics cards would never break and crypto miners wouldn’t care about their hardware getting hot.
Old doesn’t mean heat abused. Gaming laptops or ones with discrete GPUs often have issues and it’s always because of the GPU. If it posts it doesn’t mean that the GPU won’t die soon or is problem free, gaming laptops have the most heat abuse and are constantly dying and having issues. Performance degradation because it’s old is a different claim from saying heat damage doesn’t exist.