Yeah, I think anyone who has continued to be isolated through home school, being in rural congregations, etc could still be really fundamental. Although the internet helps keep people informed to some degree. I don't think this more laid back attitude has to do anything with the Witnesses specifically. It's a much larger macro culture thing. 200 years ago everyone lived or died by the church. Over the years people have generally become more progressive, secular, or less believing/fearful of the church and it's power. You see evidence of this across every brand of Christianity. 50 years ago no one would have thought we would see the cultural changes today of the acceptance of the LGBT community or gender or racial equality. Granted these are still issues, but especially people under 20 seem to be the most accepting of these things. There will always be the regressive parts of society but it seems more often than not the larger population slowly progresses even if there are pauses in that progression or reversals at times. Even all of the nationalist rhetoric you see in Europe and the US still represents a minority of those populations.
Anyways, all this to say is I don't think most younger witnesses are really even conscious of the more relaxed attitudes. They've just been raised in a different society and along with that I don't notice as much fire and brimstone from the platform. I think the day to day teachings have softened as well even if the main tenants are still very fundamental. So I think for some younger witnesses the social aspect is important, they believe it's the truth, but they don't get all judgemental or extreme on the smaller things like alcohol, entertainment, beards, etc. Hopefully, if some of these progress and become elders themselves perhaps we'll slowly see a shift towards those attitudes and becoming a bit more of a moderate religion. We'll see I guess.