I agree with your net clearence on serve vs ground stroke argument, but not the below statement.
A netcord can land very close to the net even on a rally ball, and arguably a net cord on a rally ball has more lucky space to land, it can roll over the net from left side all the way to the right side and still a good ball. A service net cord has more chance to go outside the service box (and so less chance for a lucky winner vs a ground stroke netcord lucky winner). Also at lower levels, possibly the returner is anyway inside the baseline to defend against some possibly short serves as well. A non-netcord ground stroke can land really deep close to the baseline, and so the court space or range to cover on a surprise lucky net-cord ground stroke is arguably more.
Anyway, that being said, I totally hate the idea of serve let winners. But I know that it is purely because of the way I learned playing. Same thing with fast 4 format vs traditional set. I can see the advantage in new format, but I hate a change like that.
Not sure if you understood exactly what I was attempting to get at with that statement. If the net dribble happens on the serve, the other player never had an opportunity engage in the rally at all.
OTOH, if it happens during the rally, this is not fair either. But, at least in this case, both players have had an opportunity to participate in the rally. (And possibly even get to the net during the course of the rally).
The latter has happened to me a number of times over the years. However I tend to go to the net quite early in a rally and have often had a play on the dribblers. When it happens in doubs, my partner is usually close to the net even if I am not.
Anyway, adding a short service line, like badminton in pickleball have, would take care of the dribble situation for the serve. But that line would not be used during the rally. They would still be the unfair dribbler every once in awhile during the rally. But I think this has been less frequent than the serve dribblers when I've played.