I rarely fly within Europe, so I don't know how time reliable those flights are, timewise. I do know that trans-Atlantic flights can get delayed significantly. On 11 arrival in this century, I've been an hour late arriving in Europe on a flight from the US three times, but I would expect more on time arrivals for flights within Europe, particularly if the cities are fairly close. Of course the problem here is that if you leave late, it's hard to make up time on a short flight.
So I'd agree with your assumption that if you don't have to get back at a certain time, a short connection might not be a bad gamble. But, that is assuming that the airline does reliably cover your missed connection. I'd be interested to hear what other traveler's experiences have been. Did the airline cover it, or were you left on your own?
I was once on a United flight from Denver connecting in Detroit to a Lufthansa flight for Frankfurt. It was winter and they first de-iced the plane; that took an hour, which was the connection time in Detroit. When we got airborne, I mentioned it to the FA and she checked the manifest. There were 13 of us connecting to Lufthansa on the flight. United meet us at the gate with a van and took us to the International terminal where they were holding our connecting flight.
They did that for 13 of us; would they have done the same thing if it had been just me?
BTW, as I sat in the van going between terminals, I was glad that my carry-on bag, my only bag, was sitting on my lap. On the same flight were half a dozen business men going to Stuttgart. The were walking around the gate fat, dumb, and happy, hands-free, having checked all of their bags. I'm sure when they got to Stuttgart, they were still fat and dumb, but maybe not so happy if their bags had not made the now-extremely-short connection.