So why do owners spend significant sums of money on rear axle, suspension and engine enhancements if they desire imperfection? I can't see the logic in sneering at the qualities of a well engineered car and then trying to replicate it.
I assume your car is an unmodified, warts and all example of a Morgan?
The owners I'm talking about desire imperfection as a starting point, not an end goal. I'm not sneering at the qualities of a well-engineered car, just pointing out that Morgans are not always capable of meeting the modern criteria of robot-built products, and that factor is best appreciated before one commits to purchase, rather than learned after the fact.
I believe that many Morgan owners like to improve their cars. This is what the old-style enthusiasts (the 'Flat Cappers' as MMC used to call them) have always done, and indeed it was Peter Morgan's oft-quoted view that the cars were a basis for the owner to work on, rather than a finished product. If one wants to buy a car to improve, then it stands to reason that one wouldn't go out looking for a car which needs no improvement.
My own car is about as far from 'original' as it's possible to get. Different engine, different suspension, revised gearbox, different final drive, the list is pretty much endless. I treat it as a giant Meccano set, I absolutely love playing about with it and see no reason at all why a 30 year-old car should be maintained in original condition. And yes, I do have a flat cap

To my mind it's a strange state of affairs when unusable performance and the symbol on the bonnet are considered desirable and command a premium!
Is this a dig at BMW powered Plus 8 and Aero owners?
absolutely not. I seriously doubt that any Morgan owner bought a Morgan just because of the badge. It's more a dig at the wider car market.
It's objectively true that if one wants a functionally perfect car (in the sense that it does what it's supposed to do with the minimum of servicing and 100% reliability) then all one needs to do is to go and buy a Toyota or a Honda or a Hyundai. (Other similar makes are available).
It's also objectively true that many people perceive cars from this group as being somehow 'inferior' to BMWs, Audis, and the like (other posh cars are available). Furthermore, the market demonstrates that such people are prepared to pay a premium for them, despite the fact that the use they put them to would be perfectly well addressed by the aforesaid Honda or whatever, and they will never get anywhere near exploring the enhanced performance envelope that these cars offer.