Maybe we don't want to shift him.
If we can command 34 million for ESR who has started only one game in last 2 seasons, surely we can command up to 45-50 million for a Striker having started at least in 12-15 matches over last two seasons and has about 40 goals in PL/ FA/ EU/ CL combined ?
Besides, this is all academic,since it depends on the player and the manager how much each wishes ( player himself and the mgr) to stay or to leave/ be gone.
Nikh and ESR had different functions and played different roles hence the needs for each player for Arsenal were different.
Arsenal had different options for a no8 and also in the wings had established/proven players in Martinelli/ Trossard, so ESR was in a difficult position.
But Nikh, can be started in certain games, provides a different option from both Havertz and Jesus so has some use for the team.
I'm not saying he's absolutely necessary, but definitely at a much better situation than ESR was. Again, if a good offer comes along will they negate it ? Probably not, but who knows? Ultimately depends on the mgmt team of Josh/ Edu/ Arteta.