>which will then lead to a big interest in anti-satellite weapons since these will become major targets in a hot war

If anything, the other way around. Were Starlink a traditional satellite constellation, with a few in geosynchronous orbit, they would be very appealing targets. But there are thousands, and soon tens of thousands, of Starlink satellites, which makes any sort of weapon against them other than maybe a laser impractical.

>The end result here is going to be huge quantities of space junk

... the Starlink portion of which naturally falls back to earth within five years.