yes, that is why.
Your motor (all motors) come from the factory with a very tight seal between piston and sleeve - it's not broken in from the factory. When you break it in you are mating the piston to the sleeve, making a "just right" seal, as well as getting oil in all the right places, etc. It is going to be very tight until you've run several tanks of fuel through it.
And, turning it with your finger - you should be able to turn it about 75% of the way and, with difficulty, MIGHT be able to turn it the rest of the way.
Just be patient. If your friend is coming, I would wait for him.