Properly cooked, crispy chips are a real treat - so being able to cook them IS a skill to be proud of.
Re. Rochelle not having the skills - I think she was chosen because she doesn't have the skills to just get on with it. If they had chosen someone who did a lot of cooking, and had grown up in the 60s and 70s, learning to cook with far more basic equipment, it wouldn't have been such good TV, because they would have coped better.
I suspect Rochelle is a fairly similar age to me, but it's clear she didn't get taught cooking as a child, in a fairly basic kitchen, in the way I did. Which is not a criticism of her or her upbringing at all - it just explains, for me at least, why she has struggled with things someone with more practical experience in the kitchen could have done more easily. But as I said, that would not have been good TV.
Although, strangely, it was good TV to watch Debbie in the kitchen - whilst her catering college training would not have included using the sort of equipment she faced in the programme, the cooking skills she did have made it easier for her to cope with the archaic equipment and still cook skillfully and without too many struggles. It's a paradox.