So what exactly is wrong with choosing not to have a mate??? At the moment I choose not to have a mate, personal reasons I won't share here, so in your view I'd be a bad role model?
Indeed. Mammals and birds--in fact almost all chordates--are programmed with the instinct to mate. It's one of the mechanisms by which the species survives. Many mammals do not form permanent mating bonds, but
Homo sapiens happens to be one of the few that do. Our young have the longest maturation cycle of any mammal--roughly fifteen years, compared to five for elephants and only two for whales. This requires both parents to participate in raising the young for quite a long time, and the mate-bonding instinct is key to that.
Our species has several unique or nearly unique attributes that aid in the survival of our young. One unusual one (which we share with dolphins as well as our closest relatives, the chimpanzees) is that human females are capable of copulation when not in estrus. This is a tremendous aid in keeping fathers at home.
Most, if not all, of the children which you (either hypothetically or in reality--your prose is rather vague on the subject) are raising are going to have the standard set of instincts, which means that they will gravitate toward pair-bonding. They're going to need those fifteen years of parenting so that when they approach adulthood they'll be prepared for all of its aspects, including mating and parenting.
Being raised by a single parent is already a bit of a handicap; a single parent who has no desire to bring a mate into the home, even a succession of temporary mates, presents an even stronger handicap. One who does not even believe that having a mate is important, or actually believes that it's a bad idea, is going to be quite a challenge to the kids' maturation.
Obviously there are children who are raised this way, and many of them overcome the handicap and mature successfully. But many don't.
You keep making vague references to a strong reason for not choosing a mate. That's your business. But I do believe that the odds are very high that you would, indeed, not be a very good role model.
I'm not a good role model for children because I never wanted to have any. But I was careful to never actually have any, so it's not a problem for me or any hypothetical children.
You seem to think that you could raise children even though you don't even want a mother-figure in your life. Maybe you could. But why take the risk?