Ukraine has also conducted numerous strikes on Crimea's Command, Control and Communications centers over the past few months. In addition to the equipment/infrastructure, consider the human losses in these command center strikes too. Datalink management and understanding the entire battle space isn't a simple job, and taking these people out is significant.
Here's some additional information on the shoot down.
Russian Telegram channels shared more details about the Russian aircraft that crashed yesterday in Crimea.
Reportedly, it was a Su-27 and it was shot down by the Russian Pantsir anti-aircraft missile-gun system. For some unknown reason, the air defense did not receive notification of the departure of their Su-27.
Because the Pantsir system's combat crew did not receive a response from the Su-27 pilot to its interrogation, a decision was made to fire the plane for effect. As it became known later, the system's crew interrogation did not reach the Su-27 pilot because the IFF interrogator on the Pantsir system was not working correctly.
Some Russian media called this a "technical deficiency."
https://twitter.com/Gerashchenko_en/status/1773734369473044808
Without a doubt, Russian air defense components are operating in autonomous mode.