You're right. I lived in the part of Indiana that did not change... it's manageable either way. But computers don't always handle it. (I'll explain that later).
I had to look to see when we finally changed: From 1970 until 2006, most of
Indiana in the Eastern
Time Zone
did not observe daylight saving time.
They must have been in an area that didn't have cross-over. I lived on the border with Ohio, so we had daily interaction with people in both time 'zones' and learned pretty quickly how to manage both times. You just had to be careful and clarify what time you were talking about.
I never really cared one way or another.
My one (I believe) VALID complaint about time change revolved around working night shift at a hospital. We document and time stamp everything we do. The nights of time change make the job complicated... IV Antibiotics are time driven, and you can't be off by more than 15 minutes, narcotics are time sensitive as well, it got hectic making sure everything stayed 'on time'. And our computer system did not adjust the times meds were due for you. You had to do that manually, and then explain to the system why you were overriding a med and giving it early (which it is not designed to do) OR stare at that red warning box for an hour because you are giving a time-sensitive med "late" when you really just lost an hour on the clock. I'm sure there are better systems which would account for this, but ours did not.
But, worse than making sure the meds were on time, was trying to document WHEN the patient actually got them on the night we fell back and GAINED an hour. I had to make sure that the documentation was clear when I essentially had an hour that "repeated" itself. It was 2AM for two hours.

So, did I give that narcotic or antibiotic during the first 2o'clock hour or the second 2o'clock hour? Because that matters... And I have to be able to time the next dose correctly.
And you have to get all that done and correct even in the middle of an already hectic and crazy job...