That's why they're teachers. And not multi-millionaire business owners. They're timid and wedded to the safe, comfortable options in life.
When you leave school, there are multiple paths to you earning more than your teachers in 12 to 36 months.
I bet that if you looked at the romantic partners of your teachers, you'd see that they're not all that.
And that there are other areas in their lives where they are socially conditioned and behave and think like good little drones.
You deserve a better life than your teachers. And better romantic partners than them.
Being proactive in social networking beats being passive.
You're not an idiot. You know how to do a risk assessment when it comes to online dating. And how to manage and minimise the risks.
You can just smile and nod and feel superior to your teachers and other people when they are giving you advice that isn't appropriate for you. There's no point in arguing with people that know next to nothing about what they're talking about.
On the other hand, it's really good practise if you can seek out and follow the advice of mentors in particular areas. People that have a proven track record of success in whichever endeavours you're looking to get in to...