Not sure what the problem is. Keep doing it.
This is how I operate in most traffic jams, since I only own manual cars & it’s much easier on my leg.
I genuinely don’t even remember any specific scenarios where somebody merging in caused me to have to come to a full stop (where I wouldn’t have had to stop if they didn’t merge). Not saying it never happened, but it was so rare and unnotable that I don’t remember.
I do live in the northeast US, so maybe that has something to do with it, but I don’t usually feel like I spend meaningfully more time in traffic because I let a few people in front of me.
Bonus benefit: my life is measurably better since I stopped getting pissed about people being in front of me. Road rage had such a broad impact on me, even after I got out of the car.
For sim, I utilize iRacing to practice and learn tracks before real life amateur endurance races in champcar and lemons as well as track days.
IMO iRacing physics are so good and the tracks are so well modeled that it’s a very effective learning tool. It’s the first sim since Live For Speed that really feels close enough to real life for me to forget I’m playing a sim.
Plus traffic management and race craft are so crucially important in wheel to wheel racing & I simply don’t get any other opportunity to practice those.