Change a 904 to manual valve body

I don't know how the conclusion is reached that someone is 'lazy' because they have a MVB. Just the opposite in fact. With fully auto, put in Drive & forget about it. With a MVB, there will be times where it needs to be shifted.
I have had MVBs in all my street cars & there are many good reasons for doing so:
[1] petrol is very expensive here, so keeping rpms low saves money. I can drive nearly everywhere in D, & take off in D from a stop. The tq c'ter does the work. If I am on an incline, I might use 2nd.
[2] because trans is not shifting gears all the time, trans lasts longer. Saves money in a country where parts are expensive.
[3] In auto form, the trans will shift early or late at times. It is never going to get it 'right' every time. With MVB, you the driver get it right every time.