Well let me just tell you about my own experience. My mom and dad got divorced. My mom is a lesbian she put that aside for religious values and in the end couldn't and lost most of her religion though she is coming back a bit. Anyways my dad was left alone and searching for a companion, he looked for many years. He had options not a ton but some. The one he chose was a widow with 6 kids, not because he wanted to deal with the kids but because she was the one that made him feel the best as opposed to others who didn't have children.
The kids were not easy to raise (and still raising, he still works 6 days a week), and put him through doubts of if he make the right decision, but she was always putting in enough into the relationship to make him feel like though it was hard, it was worth it. They recently this year just had a child together after more than 10 years of marriage which is actually amazing because she was pretty old to be having a child.
I'm not saying it is the ideal to be with someone with a child, in fact my ideal woman doesn't have one and I'm not trying to discourage you all from finding the ideal woman, but if you really had no other options I don't think it's the worst thing in the world. My dad's wife cooks for me when I go and visit, she is a really amazing cook, the best salads and home made bread you've probably had, I used to think I hated all fish, then she made me salmon and put lemon on it and now I really like it, and now they have a son.
Especially if the woman is older and the kids are grown that is almost 0 effort on your part, that wasn't the case with my dad he had to deal with young kids, and that takes a LOT of energy and I'm not saying it should be your role. I'm just saying if she is the best one you have met of all the women you know, I wouldn't look down on someone who did choose her.
I'm actually PRAYING that the girl I love doesn't have kids before I get her, I have actually passed on a gorgeous girl who seemed nice because she had a child and I didn't want the trouble and thought I could do better (and also like I said when people are deceptive about having the child, which she was a bit, I don't like that) , and if you had the option of a high quality woman without kids you should take that. But this is the real world, not everyone is blessed with a ton of options and unlimited time. The lesson I learned was that it's better to have something that's not perfect than be alone for the rest of your life.