No one can argue an auto doesn't shift faster. If you're after hundredths of a second on the track, you want a DCT. If you have physical limitations, maybe there is no choice. That is truly unfortunate. My knees aren't the best anymore either, but I'm fortunate to be able to clutch without too much pain.
My choice, as long as there is a choice, will always be manual. it's not about clock time. It's about blasting down a tortured, twisting canyon road, sun searing my face, wind gently swirling around me, trees and cliffs a blur over my head. I'm enjoying the minute mechanical subtleties of every shift. Feeling the clutch plate relinquish it's firm grip, causing the expected weight transfer exactly when I want it to occur. Feeling the shift collar splines slide from the precision confines of one gear. Feeling it push against the synchro of the next gear, oil squishing out of the cones as some minor speed mismatch gets corrected. Feeling it nudge the balk ring teeth out of the way as it slides precisely home into the next gear. Re-engaging the clutch, feeling the initial gentle friction bite build quickly to full torque transfer. Another perfectly anticipated and placed weight transfer. Engine growls in delight, torque coursing through the spinning gears, flowing around the crazy planetary gears of the differential. Aggressively twisting my tyres, deforming, conforming, gripping the roadway, launching me and my Zed, machine and man as one, out of the corner. Then repeat it all again for an upshift. And just like that, another impossibly sharp corner swings into view, and we fly eagerly towards it.
No robot shifter can ever replicate such a kinesthetic experience. No doubt some of you can never understand this. Maybe some of you have some glimmer of understanding. Many others are nodding sagely, grinning stupidly as they reach for their keys. If your auto box gives you the most enjoyment, then that is the way to go. A manual gives me the most enjoyment by far. It is the way I have to go for as long as I am able.