Wars have a weird amount of holding back. Going after civilian infrastructure is often seen as "ungentlemanly", basically bad PR. Most Ukraine attacks like this seem to be to prove they can, not to cause significant civilian damage.
Basically, Russia has a number of nasty options, currently unused. Ukraine is also unusually dependent of foreign help, and so it is vulnerable to the world opinion changing. Ukraine is mostly proving its threats are viable.

That's literally one of the advantages of induction over resistive. Resistive heat an element, that heats the pot. Inductive use a magnetic field to induce a current in the pot. That electric current then heats the pot directly.
The only heat in the stovetop is either bleed back from the pot, or resistive losses, which are quite low.