If you can afford it, it's not a waste. We get our oven cleaned twice a year. Best thing ever. It costs £60 so we put £10 aside a month to pay for it.
It's down to individuals what they feel is wasteful and what isn't, however on here you are usually shot down for anything that's worthy of an argument, ranging from holidays, where you shop, cars, clothes etc and using credit cards are the work of the devil (if used in the wrong way, yes they are lethal)
For instance, we went to Budapest for 28 days, three years ago. It cost us £980 self catering as we booked with the person who owned the flat direct rather than using an Agent etc. We put it on an interest free credit card (to get points) and cleared it within three months. The points we then boosted and it paid for our National Trust membership for the year, a years pass to the Safari park and a years pass to the zoo.
There was no interest on the credit card, we gained from the points and the card was closed after.
If your putting holidays and everything on your credit card and never clearing it then it can get troublesome. I have a credit card and clear the balance monthly, DH does the same. We have a separate holiday pot and we book with an interest free credit card (for protection) and clear it either within the year or two months. If we lost our jobs, we could realistically survive 2 years without employment.
I've been on my arse and literally counting pennies so I work to ensure I'm covered, yet people will have an opinion on me wasting money on something but they have no clue about my finances.