2 way is better than 1 way wireless. It's not a myth it's fact.
While quality is a whole different issue, 2 way wireless have huge advantages.
From a battery life POV many 2 way systems can sleep or switch indicators off to reduce running costs.
From a security POV a 2 way system means that both the panel and detector know if the signal has been received.
At the end of the day if it's a low risk property any alarm is better than no alarm, so I see what you are trying to explain.
However, it is important people understand 1 way wireless is cheaper for a reason and that it's only purpose should be low risk properties.
This I agree with.