This is not entirely true. I believe it can put you at risk for cardiac arrhythmia, and the risk goes up steeply the more nicotine you intake to simply cardiac arrest. I believe this is depicted in Thank You For Smoking when the protagonist is covered in nicotine patches and almost dies. It’s entirely possible that was do to BP issues but I wouldn’t dismiss it as trivial in that case.

Also if you read about the native american experience of smoking uncured tobacco, it seems like it was likely a near death shamanic experience and it did kill people occasionally.

That said, it’s rather easy to moderate your intake with the percentages, so it’s not a problem for most people (I hope).