No, your reasoning is a common fallacy: assuming that A and B are independent probabalistic events.
Attackers are not earthquakes.
If we assume that both NSA and Huawei are intelligent actors (spare us the jokes please) and that both NSA and Huawei have the option of abusing a certain power, then
P(I get pwned) = P(NSA wants to pwn me) + P(Huawei wants to pwn me) + P(other)
Either NSA or Huawei can pwn you with this power, or both. Even if they both elect not to it's still possible someone else can and will.
Attackers are not earthquakes.
If we assume that both NSA and Huawei are intelligent actors (spare us the jokes please) and that both NSA and Huawei have the option of abusing a certain power, then
Either NSA or Huawei can pwn you with this power, or both. Even if they both elect not to it's still possible someone else can and will.