Not sure of sarcasm or you do mean it....... it is true that nowadays tyres and wheels are waaaaay oversized, for the sake of aesthetics. It's an arms race.
The basic version of the IS300h, same engine and same weight, comes with 205/55/16 , which is more than enough to handle the car.
The tyre size of the F-Sport version is just ludicrous and wasteful
I investigated and that's orientative. It's not always the case, depends on the overall balancing job which is done with an accurate machine (or at least i hope so). I was ready to go to the garage and shout at them