Same here. I was aware of the possible misalignment, so i was also very careful not to tilt the Noctua fan whilst installing it - its a very tight fit indeed, but being careful ensured that the fan installation succeeded without significant resistance in my case.
Adding a data point: Noctua A12x25 G2 PWM (bought from Amazon) drops right in. No friction.
Same. When I got mine the other day, I had a bit of trouble getting the fan seated at first, and feared I had fallen victim to this. But being very careful to align the holes and make sure the fan was completely level and descending at all four points simultaneously ensured the fan seated properly.