Of course, bear in mind who's saying this. Doubtful if Karpov or Petrosian would ever try to make that point...
Exactly ! Listen to young Magnus explaining on TV that he just "feels" what the right move is in most positions...
Kasparov is an fantastic calculator, but certainly not as strong as Magnus in equal and calm positions...
Indeed. The top engines today are what they are due to significant advances in programming strategic planning into the "minds" of the beasts, in addition to nearly flawless tactical calculation.
Deep Blue employed brute force (tactics) primarily, and ran on a super computer. It could beat my iPad or my phone, but stands no chance against a notebook computer today because the software is vastly better, and includes strategical concepts.