I think it's because people will feel judged. There is quite a big range of acceptable tech rules -- some families have very strict rules (30 minutes on weekends, no weekdays, for example) and others have very relaxed rules (just don't bother me when playing video games) so it's one of those things people don't like to say.
But you should talk about it. I talk to my friends about it even when it is revealed to be a lot different than mine. Keep in mind also my kids always tell me I have the strictest rules ever --- so it's helpful to know that simply isn't true.
My rules are for teenagers so doesn't apply to you probably -- but they are
don't abuse the texting - if you do, you lose your phone
all electronics are to be plugged in to be charged in the evenings in the kitchen
no phones at meals
don't screw up social media.