There are PC elitists out there with incredibly closed minds (for example, few 'console gamers' complain when a console game goes to PC, but how about the complaining when Diablo 3, Day Z and others have been announced for console?), but that's also getting more than a dash off topic. I'm not suggesting you in particular are closed-minded, and I'm not suggesting that there aren't tablet or console gamers out there with equally closed minds, but there are plenty of PC gamers that have very defensive attitudes to cross-overs with other platforms that make console fanboys look relaxed.
I fully agree that for PDS strategy style games the mouse/kb is the best interface, and the gamepad would be crazy, but you could make a game like CK2 or HoI3 work with a touch interface much easier than with a gamepad (which is possible now with Xpadder if anyone was crazy enough). This need not involved dumbing down at all - no-one ever suggested that, and I don't think it would be in PDS' interests - whenever they've released a 'trimmed down' game along the lines of their core strategy titles (Sengoku and an EU2 spin-off focussing on Scandinavia come to mind) they've generally not done that well in any event. People don't come to PDS to play games like Axis and Allies, and I think PDS knows this and I don't think you have anything to worry about.
Also, at least in single-player (the latest stat I saw was 80% of EU4 sessions are single-player or something like that, so likely the majority of PDS strategy players), the control over the pace at which the game is played, and being able to pause at any time, mean that there's no pressure on the fact that a player is likely to be able to 'tap' a little slower than they can click, and scroll a dash slower on a tablet. Everything in a PDS game is available with mouse clicks (ie, the controls are accessible on screen) - with an emulator that converted touches into mouse clicks you could play most PDS games on a touch interface now if one wanted to put the work in and was so inclined.
So, it could work, the processing power is there (in high-end models - it'd be a bit slow for me, but people play PDS titles on PCs just as slow right now), and from the OP we know that there's at least one person who's interested. Rather than a knee-jerk, emotion-driven "don't port to tablet, it'll mean everything's casualised", a more rational response would be "OK, do we have an audience on tablet for the games we make, is it worth the cost of adapting the interface and doing it properly?" I'm not saying the answer is yes, tablet is not the same as dumbed down, just like PC is not the same as complex (as per another example I gave, PC gamers in War Thunder have made it a more dumbed-down and casual experience in most lobbies than console gamers ever could - apologies I can't give a tablet example, but I don't game on them m'self).