I'm guessing here that you neither of you has had any RL motorsports experience, or that it's been extremely limited? If you have, and you think it is "easy" and you are actually winning those events, then you are an absolute natural and you should go forth and make your career out of it.
But, if you haven't, then you need to go do that for a few seasons before you go suggesting that difficult isn't realistic. Same if you are doing events but not winning - in that case it's "easy" because you aren't pushing hard enough - you'll know you are doing it right when it suddenly gets challenging and difficult - when you realize that you can push your car right to the edge and hold it there and that if you aren't very, very good you'll lose it... And it's that challenge than makes it fun. Seriously, what would even be fun about any of this if it was easy???
It is, however, extremely easy to be tricked by the "street" experience you may have had. Hell, just go look at some of my very early posts and you'll see that owning and "driving with spirit" some very powerful cars when I was younger, on the street, convinced me that somehow I should be able to handle powerful cars on the track in sims. Hahahaha, what an ignorant fool I was!
Lucky for me, I got involved in amateur motorsports shortly after I got into sim racing (right around the release of GT4) and have never looked back (once you have the bug you are pretty much hooked for life). RL experience taught me a lot about SIM racing too. I can still be fooled at first by a sim that "feels" pretty good, but then falls apart with experience. Often what happens is I discover that FFF "Fudged Forgiveness Factor" - a fake safety-margin - when even though a car "feels" about right I can do idiotic things, like slamming the go-pedal all the way down and keeping it there in a light powerful car in the rain, and just magically everything is fine. Or hammering hard on the brake for sustained-periods in an MR or RR car hard in a corner without having to worry that the tail and nose will flip ends. This makes the "sim" quickly bore me because car-control is a huge amount of the fun, both in RL and SIM racing.
So, to those of you who think that "easy sim" = "realistic sim" - all I can say is go out and do the real thing and then come back. You won't feel the same way. Plus, you'll have a hell of a lot of fun!