> Similar to shooting down your own satellites.
No.
When they do that as a show of force, they shoot down some worthless EOL satellite they don't plan to use ever again. IIRC, the US actually shot down one that was damaged and out of control: a show of force with a "safety" pretext.
You don't shoot down valuable, active infrastructure as a show of force. Russia blowing up Nord Stream would be like the US shooting down brand new GPS or spy satellites.
So? Both are perfectly serviceable, and neither is EOL junk, which is what matters.
Even with your distinction, blowing them us is like the US shooting down a new GPS satellite that just hasn't been officially "turned on" yet, which is pretty much the same loss as shooting down a similar sat that's "active."
It can be argued that this destruction is a loss for Russia, but Putin didn't loose anything.