Is there really such a clear dichotomy between open tarps and enclosed tents?
The OP implies that open tarps offer a qualitatively different and superior experience to enclosed tents. My response would be: not for everyone, and not in all conditions.
In reality there's a continuum from cowboy-camping through many types of tarp, to tarps combined with a bivy or nest, through many types of tarp tent and on to conventional tents. As soon as a tarper adds a groundsheet and insect protection they're carrying the same components as a tarp-tent, so the whole distinction becomes pretty moot.
For example I now use a tarp-tent that weighs less than my old tarp/nest setup. Are you really more "at one with nature" when imprisoned in a tiny bivy under a flat tarp in storm-pitch? And even with a conventional tent many people sleep with the doors open when conditions permit. The whole issue is quite ambiguous and nuanced.
In practice the best choice is a balance between personal preference and local conditions
I know people who flat-out hate the idea of tarping. They walk all day in nature but find that they sleep better with the psychological protection of an enclosed tent. And this is surely a perfectly valid choice?
But even for minimalists the sensible choice will vary with conditions. In the New England woods tarping could be great for some. In an Icelandic dust-storm, not so much. Some ultralight tarpers will put up with almost any level of discomfort or inconvenience in pursuit of their ideal, but most of us are more pragmatic.
Where tarping breaks down: a summer trek in the Scottish hills
In the right conditions I love to cowboy-camp or tarp. But not on a multi-day in the Highlands...
If I camp in a sheltered site I might be dealing with hellacious swarms of biting midges. If I choose a high and exposed site to avoid the beasties I may be hit by sudden 70mph winds and driving rain from unpredictable directions. I may have to camp on very boggy ground. And the ticks can carry Lyme's.
I could cobble something together with a flat tarp and bivy. But it will be less practical, less safe and likely no lighter than a storm-worthy tarp tent with integrated insect net and bathtub groundsheet. The tent wins - I'm there to have fun, not to meet a Platonic ideal of purity.
So in Scotland it's vanishingly rare to see a tarp in the hills (the exception is the TrailStar with nest, but that's a special case). You'll find the same in Scandinavia. In northern Europe tarping is generally restricted to the woodcraft crowd, and for good reason.
I'm sure there are many other scenarios where tarping is a step too far for most.
Pragmatism trumps dogmatism
With ultralight tarpers you often find there's a whiff of "holier than thou" as though their experience is somehow more pure and more valid than everyone else's.
But we all go to the hills for our own motives and enjoy wild land in different ways.
So find the balance that works for you and your local conditions, and hike your own hike!