Ghee is similarly (to lard) good at not creating free radicals when used for deep frying.
It's the polyunsaturated fat content that is of concern and since all animal fat are extremely low in poly fat they react less to heat damage. Free radicals, or should I say oxidative deterioration begins at 302 degrees fahrenheit which then form new compounds like free radicals, yeah not what you want to be consuming.
The other major health concern with consuming oils high in polyunsaturated fat (most seed oils) is chronic inflammation, which is the basic foundation from which all non communicable diseases like insulin resistance, diabetes, obesity, hypertension, heart disease begin.
Our basic physiology has been a work in progress over the last 2 or 3 million years and what we've decided works for us is an omega 6 to omega 3 ratio anywhere from a 1:1 to a 4:1 ratio. Today and actually the last 50+ years that ratio has increased to around 15:1 to as high as 30:1 depending on variables like social and economic factors and race. Basically too much plant oil and not enough fish oil. This imbalance drive chronic inflammation.
There's been a feeble attempt to introduce omega 3's in the food supply to lower that ratio, but it's pretty well useless considering the amounts that would actually be needed and the fact that the omega 3's they're using are not from fish oil but are plant omega oils referred to as ALA which the human body need to convert to EPA, which is the actual essential fat we need, and that conversion is really really low, and then that converted EPA needs to be further converted to DHA which ends up being less than 1%. It's basically virtue signaling to an uninformed pupil at large, but they do know it does nothing but it opens up a new commodity and source of income for their shareholders.
This can basically be traced back to when crisco took industrial seed oils pretty much used exclusively as lubricants for machinery in 1909 and created an edible fat that looked like lard and then after the wars during economical hardships these got really popular and then of course we were told that animal fat, cholesterol and red meat is killing everyone with the diet heart hypothesis, yeah not the smartest thing the USDA has ever done, which ushered in the high carb low fat era, nevertheless that dogma will be a tough one to shed.
Even the Indian population was convinced and switched out their ghee with these oils and now they are the leading country for heart disease in the world and have more people with diabetes and Insulin resistance than the USA and that's saying something. I would never ever advice anyone to consume these refined seed oils. Use a refined olive oil, avocado oil for cooking if some feels they still can't get their head around that animal fat and mother nature might not be trying to kill us.