Why would dormancy be necessary outside of suboptimal conditions?

[RiverbankMudlark]

I'm planning on getting a Sedirea japonica Minmaru and Minmaru-shima. In preparation for it, I've been doing a bit of a deep-dive into Sedirea japonica care/culture and... I'm not gonna lie, some of what I've found confuses me.

A lot of people say that Sedirea japonica needs a dormancy to stay healthy. Supposedly, if it is kept at intermediate temperatures consistently, and the plant doesn't experience any sort of dormancy, it only lives about 5-10 years before "slowing" and dying of "exhaustion".

To be honest, the claim seems a little bit anecdotal to me. Like, I wouldn't be surprised if people's Sedirea japonicas are just starving for nutrients for one reason or another (e.g. nutrient lockout, the particular watering method flushes the nutrients before they can be absorbed much — maybe it's just a heavy-feeding species and wants more than it's given usually), and they are living longer when they have Winter dormancy, because during those times the orchid's metabolism is slowed and it isn't using those resources as fast (i.e. the plant is still slowly dying of nutrient deficiency, but it's "living longer" because of the added time where its growth is halted, during which it isn't using those resources as much).

To me, it doesn't make much sense biologically for Sedirea japonica (or really any other plant) to require a dormancy outside of the conditions where it protects the plant. Plants produce their own energy via photosynthesis (and they shouldn't have any reason to die of exhaustion unless there's some growth abnormality that takes all the energy e.g. some unstable hybrids grow so quickly and flower so much they die).

Though we call it 'Winter rest', dormancy in plants is a survival mechanism for suboptimal conditions (too cold, too dry, too dark). Since photosynthesis itself is reduced from less water and less sun (as well as the cold slowing down metabolic functions), a plant in dormancy wouldn't be 'recovering' or 'resting' — if anything it would be just surviving on what little energy it can generate, holding out until ideal conditions return and it can grow properly.

Having said all of that, I'm not a botanist. This is all based on my own understand of how plants work. My reason for this post is to try and figure out if I'm wrong. Have there been any studies or research into why (or how) dormancy would be more than just a way to adapt to harsh conditions?

P.S.
Just to be clear, I'm not asking specifically for Sedirea japonica, but really all plants in general. I think there's similar claims about "dormancy is a must" with some carnivorous plants? Like I say, it doesn't make a ton of sense to me why an adaptation to survive harsh environmental conditions would be needed when those conditions aren't around.