The topic actually came up directly for the first time with my parents a few days ago.
Was opening a letter from vanguard while visiting and my mom didn't know who they were which got us on the conversation.
At some point she actually asked me straight out something like "Do you even spend money on anything?"
Now she can't even add two digit numbers accurately so the math would completely elude her, but I think she pretty much accepts it at face value that my investment accounts will blow up real fast and I'll be living the good life in no time (I already love my life, that's just an expression ^^). After all, if your roommates pay your mortgage (with a small profit to cover utilities too!) and you're only spending money on cheap beer and food, while raking in a computer programmer salary, you're going to get rich FAST. You don't need math to understand that.
Then my dad's an aeronautics engineer so he would understand the math just fine. He never asked about it though, and I didn't volunteer. He LOVES his job... if you ask him about it he'll go on for hours about it (most people avoid the topic afaik lol). So the fact that I'll probably retire before him despite him making twice as much as I ever will probably doesn't matter. If he really wanted to he could retire right now with the money he's saved. He just doesn't want to, will probably work long past the traditional retirement age.
Overall they've been pretty accepting, though I wouldn't call it "supportive". I think the fact that I became vegan 3 years ago kind of shook the boat as much as it could bear and now nobody in my family is really surprised about anything I do anymore...
But anyways on the topic... they know I'm not "deprived" of anything. I've lived this way my entire life even when I was living on their dime. I just have no interest in most of the things people spend money on, and wouldn't engage in them even if money wasn't a factor.
I think it's a lot harder for people who embrace mustachian values later on... since people just aren't used to that and don't expect it from them. Though I'd have to admit it's probably a lot more impressive for those who go against their nature to embrace these values than for someone like me who was just fortunate enough to be born that way.
forget your co-workers. do what is right for you. let YOU be the one to choose how you live your life and dont be afraid to go against the crowd. maybe you enjoy living frugal. its no ones business. you need to make the choices that are right for you. people love to say its a free country then criticize or attack others who have a different opinion than their own. make your own choices.
for instance- i believe in saving and living below your means. when it comes to investing, i think bogleheads are irresponsible. in fact i have some ira and retirement money in indexes but the bulk of my money i use to day trade. now i know thats a bad word to say around here but its whats right for me, may not be right for you or others, but for me it works. i enjoy it, im pretty good at it and im most comfortable being out of the market for the most part at the end of the day. i trade 2-3 days a week and most months i make more doing that than i do at my job. again im not saying you or anyone else should do it im saying it works for me. now watch others read this and watch how they attack me and send me articles that say i cant beat the market and all sorts of garbage and you know what- i dont care what they say. in your life you shouldnt care either. LIVE YOUR LIFE THE WAY YOU CHOOSE. now go forth and prosper!
There are certainly people who can beat the market consistently.
e.g. Warren Buffet.
But even he recommends that most people stick to index funds... because they're not him.
Most people lose badly when day trading. Recommending most common people avoid that is hardly "irresponsible". It's sound advice that greatly improves their odds and saves them time.
If you can beat the market then more power to you, but don't try to convince other people to do the same, you'd almost certainly be doing them a disfavor.
Yeah they should live the way they choose, but chances are choosing the safer route will be much, much better for them.