This is only my opinion but in my experience there are very very few people who lucid dream all the time with no practice and it just happens for. Most people who know what lucid dreaming is or even don't know the term till you explain it to them have either given me responses similar to some you got. "Yes I think I had that experience once or twice when I was little." or have said "Yes I'm very interested and I'm trying to make it happen more often." I HAVE had friends or acquaintences that have said "Oh yeah I do it all the time its easy." but they are usually the ones in my circle of friends that are prone to lying, bull sh**ing, and telling awesome stories of things you know never really happened to them. They will latch onto anything to try and look special or out of the ordinary. Someone who has been LDing for a while and is familiar with the terms and such will acknowledge that there is some difficulty and frustration involved when it comes to this. They won't just say "Oh yeah I do that all the time. Every night." Don't let it bother you. Some people just always have to try to feed their own insecurities or one-up people around them to make themselves seem more interesting.