Sex and Marriage

Hi everyone. So I’m 16 and was discussing a topic about waiting until marriage. Now me personally I say total bullshit. Not everyone believes in marriage, some people r sexually incompatible no matter how much u try and fix it, and not everyone develops emotional feelings to a person they lose it to. The guy says it’s stupid because it causes more single moms, it’s against the Bible, and children are more likely to be criminals and continue there ways of sex before marriage. So I stated that it’s unfair to say sex before marriage is the right thing. If I’m divorced wit children and had sex after marriage y should I have to wait until I’m married again to have sex? Another fact that I brung up is marriage is nothing but a ring, words, and paper. Meaning I can be with my S/O for 10 years not married but I’m not capable of having sex because I don’t know him emotionally enough and I didn’t make a promise with him. Yet I’m more capable with having sex with someone I knew for 2 years and got married. A prime example is my great grandma got married at 18. Yet they divorced fast and never got remarried it is perfectly fine as her children are too. So is it better to wait or not if so what’s ur reasoning?