There are alternatives to requiring a massive amount of miners. Some alternative cryptocurrencies implement those alternatives.

Happy? ;)

I imagine that exactly wouldn't be very convincing to those audiences now, would it?

I can either give you entry points for what to search for or I can give you the gist of it. If you want neither maybe you should ignore my comment instead.

My point is that your point in it's current from is essentially un-communicable, to non-advanced technical users.