Yes I understand. The thing is IMO that trees grown the forestry way are likely to survive to a ripe age whereas stunted knotty widely spaced trees are unlikely to because somewhere along their life the large lower limbs are going to get in the way of something, especially as they grow out over a drive, that they will be poorly cut off leaving a wound open to decay which will affect the tree's health.
Also as the canopy closes those large lower limbs are going to get shaded out and die, leaving large dead knots which will never heal over.
We saw this a lot in oak standards and coppice woodland that had been left to grow on with no cyclical removal of the standards. Instead of majestic oaks with short clean boles and a huge live canopy sitting like an island in a sea of underwood the crowns closed canopy and mutually shaded out the big branches which had developed over the underwood, killing them.
The first picture in my post above is of a plantation of a wealthy old chap who had bought arable field next to his very large garden and planted it with oak, beech, cherry, hornbeam and ash ( it was interesting to see how far the ash had been infected right down to the stumps when felled). It had been well established and mechanically weeded between the rows over a period, so no other woody plants had become established in between, hence the coarse branching, then squirrels found it.
I was asked by his regular arborist to help thinning this 25 year old plantation, unseen until I got there last month. It was a dilemma, especially in view of the ash dieback, there was no reason to thin and as we were on a day rate we did the best to start recovering what we could.
One thing we could see was the oak were likely to be the only final crop and the only ones that had good form were those that had been suppressed by more vigorous neighbours as their branching was finer and they were looking more drawn up. Like you the owner said he was doing it for posterity yet he had been poorly advised on post planting treatment that would be necessary when there was nothing left of the planting grant.
Attached picture of one of your trees to try and illustrate what I would do, red lines are cuts and the two vertical lines to show which branches need removing for a first lift (cuts at branch collar).