How manageable are <15 min connection times in Frankfurt Hbf?

I will be travelling from Lyon (France) to Dresden (Germany) and I was looking at several options. One of them is by train, but there are a fairly big number of connections, with rather short transit times.

For instance, one of them (proposed by Deutsche Bahn) have a 14min transit at Geneva (Switzerland), 15min at Olten (Switzerland) and 12min at Frankfurt Hbf (Germany). Another travel gave me 6min at Frankfurt Hbf.

I am a bit sceptical about the feasibility of those connections, as I've never seen the SCNF propose such tight schedules (and doesn't propose this specific travel). While I can see myself going through the whole station in time at Olten, you certainly can take more time than that in some bigger stations (e.g. Paris Gare de Lyon) if you're a bit unlucky with platforms, seat location in the trains, delays and other passengers.

I wonder if such connection times are realistic in a big station like Frankfurt's.