Annnnd that the idea of a capsule that could only be opened from the outside was ideal, along with a 100% oxygen atmosphere, and that properly insulated wiring was a "luxury option". They learned that REALLY fast. But that actually had nada to do with actual launch safety.
Now if you were to compare the launch proven Saturn V rocket to the Russian M2 rockets, THERE is the big difference:
The Saturn V was designed by Werner Von Braun, who found that several large engines were safer, because you could build in redundancies, if one out of 5 motors failed, the remaining four could get the job done.
The N1 was designed by an aircraft designer who had no previous experience building rockets, let alone rocket engines. His solution was to build dozens of engines into it, hoping for the same ratio. Of course, the fueling systems were also flawed. The Saturn V used standard hydrogen/oxygen propellents. The N1 used hydrazine/oxygen, IIRC. Hydrazine is highly corrosive, and as they didn't keep that in mind, it ate through seals like a cop at a donut shop. Whenever it did, the rockets exploded, often during fueling, in which case, anyone on site was eaten alive.
It was simply a BAD design.
Now some stuff that WAS well designed: The spacesuit. That lived on to Mir, through the ISS. A part hardsuit/softsuit, that works very nicely. But frankly, the Soyuz design is best for capsule travel. Simple launch system, simple delivery, simple, carrying capacity. Which is why it's used by two countries.