Yes, I’m talking about quantity. You aren’t going to kill 12,000 satellites with ASAT assets. And so far, no one has managed to jam Starlink.
Kessler syndrome as a tactical weapon? The Kessler syndrom is a long-term effect. It doesn’t happen overnight. More like months to years. And since it would desteoy a lot of non-military space assets including potentially the ISS and China’s space station, it would be an extreme move.