I have geezeritus too, probably more advanced than triedac, but I still change my own oil.
I usually buy oil from Walmart and have it shipped to my house free. My wife and I don’t buy enough at our age to justify paying for the privilege. Besides, the nearest Costco is 70 miles away unless you count the ones in Canada and we aren’t allowed to cross the border because of covid. Even if we could, The waiting to get across any of the bridges, the tolls and having to deal with the customs and immigration people make it not worthwhile for us. A far cry from 30 or more tears ago when we used to pop across the border for lunch, gas, or even just go for a ride.
I change my own oil for several reasons.
I am cheap.
It gives me an opportunity to inspect cv boots, pan gaskets,steering rack bellows etc.
I only have to do it once a year so I do it in August.
Every time I have someone else do it, they mess something up. They chew up the drain plug (with vise grips I suppose) ,over tighten or under tighten the drain plug, and oil filter break clips off the air filter housing or leave the housing disconnected when I refuse to replace a filter that doesn’t need it.