Earlier quoted context omitted.
Precisely! Also, most southern Germans will understand your Austrian tongue very well. Berlin is full of “immigrants” from southern Germany, but they will go great lengths to hide it, for fear of being made fun of. The moral barrier that keeps most Germans from making fun of immigrants from other countries is void if they detect a “funny” German accent.
For me it is actually not fear of being made fun of, it is just that I don't like to repeat myself because I am not understood. Talking in a way where people understand what you are saying has tangible benefits. My home dialect is so far removed from "propper written German" that to me it just feels like talking a different language, which arguably makes things easier, because it doesn't feel like I am adjusting my A…
But when moving away one must quench that local dialect and try to speak "hochdeutsch" ("high-german")—Otherwise one can't even buy bread in a bakery without being called out as the "swabian" (which seems to be the catch-all for all southern dialects in Northern Germany). Compare that to Switzerland, where people proudly speak their "Mundart" wherever they go (and are wound up by high-German speaking immigrants).
Germany has such a wonderful regional diversity, but at the same time that inherent hostility against it... and Germans are, for some reason, super-afraid to discuss it.