You are thinking too far into it. The simplest explanation is usually the most correct. They have a product to sell and want it to be portrayed positively.

It’s a waves hand these are not the droids you’re looking for kind of thing.

Whether or not there is anything for you to worry about privacy wise, just don’t you worry your little head about it! Have we mentioned all the cool things Alexa can help you do lately?

Also related, most people have a negative emotional association with microphones. Marketers don't want people having mental associations to public speaking.

Do you also believe that Disney doesn't love money, or that the Car Insurance ad claiming they love the environment wants you to prefer public transportation rather than owning a car that you then pay them for insurance?

At some point critical thinking needs to become a regular part of your life.