That is good because it means your voice is non-geographical (within your country of course) which means that people won't know where you are from based on your voice. This means that people will not know if you are from a more privileged area or not. It also means that people can understand you easily no matter which part of your country they are from which is good because you are unlikely to have to repeat yourself even if you are talking fast, perhaps because you are agitated.
On the other hand, one disadvantage of having a voice like Siri is that Siri's tone never changes; apart from a slight rise in intonation when asking a question, Siri's voice is mostly monotone and lacks emotion. If your voice sounds like Siri you may want to think about trying to imitate other people more so you sound less like a robot when you speak. Most people do this naturally but some people have to slightly fake it, for example someone with autism might lack empathy meaning they don't subconsciously change the tone of the voice like most people do.
Personally, I think you would have been able to tell what they meant based on your relationship with the person.