I’m with you, I would want to do something about it. (my story, skip rest of paragraph if you’d like) I have fixed cables that were over several cable crossings. I had a sweater that had cables in the yoke (top down) alternating with sections of St st the width of a cable but no cable. I was working along quite merrily when I got to the end of the yoke and was ready to do the next part. Every thing I had done looked fine, but I was supposed to have a cable right in the middle that continued the length of the sweater, but I had that one as a plain section. So I ripped out just that section and put a cable in it. Now I had 3 cables in a row in the middle, but it looked planned.
Here is a tutorial by the YarnHarlot about how to fix a cable and you can do it over any length, just takes longer and is more work. It is a bit tricky to get all the crossings in just the right places, but after doing a cross, if it looks out of place you can do it over. Once you get started you can count your rows carefully to get then right. I believe she shows knitting the “ladders” up, but I prefer using a crochet hook to “knit” them up.
If you don’t want to do all that, but want to do something, the Harlot also has another idea near the bottom that is pretty good.
Link to Yarn Harlot’s tutorial.