Fair points. But....I'm fairly certain Di Maria was sold for less than he was bought and obviously Lukaka wasn't sold at his peak either.
Those transfers are more often the exception to the rule for those clubs. For every Coutinho sold at the right time, there is a Phil Jones staying far past his best by date.
Selling Eriksen for 17 million when we could have gotten 70+ million for him was a colossal failure
Holding onto Dele when we could have gotten 70+ million for him a couple seasons ago is also proving to be a disaster
Regarding Kane - had we put him on the market after he made it known that he wanted to leave and held an open bid for him, we likely could have gotten 125+ million for him. Who knows what Kane a 29 year old striker with injury histories will be worth next year?
I guess hindsight is 20/20 but you've got to acknowledge that big mistakes were made and its costing us today.