Perhaps you could approach it as a luxury to have someone else fix the leak.....a special "treat". My husband and I used to tackle pruning a tree which is on a slope. Realizing it created a major fall risk I started calling a landscaper to prune. Each time my husband comments that we could do and I say "I know we can do it but it is so nice that we can have someone else take care of that". On plumbing issues never a question as my husband never tackled that repair. A balancing act to keep their self worth intact and keeping the household together.