When will people STOP dissing teenage pregnancy?

I am 16 and ready to have a child. I am about to start trying for one actually. All of my friends think it is a stupid idea and are trying to talk me outta it and make me feel bad about it but I am still wanting to start trying to get pregnant.I do not want to wait until I get older because i have heard of a bunch of ppl waiting until they are older and then finding out they cannot get pregnant. I also do not know if I will ever fall in love and do not wanna be alone when I get older. I want to live in the moment and do what I think is best. I think if I wait until i'm older I will regret having waited. There is nothing else in life I wanna do. My baby will be loved and happy and well taken care of just like kids whose parents waited till they were 50 to have kids. I'm not waiting no matter what anyone says so my question is, When will people stop dissing teenage girls who vwant to become mothers and are ready for it? Age doesn't define how good a mother u are.