As has been muted a few times, I have OFTEN been discouraged from taking a camera anywhere... usually by family who a) don't want me taking photo's of them b) holding them up while I mess with lenses..... though I do insisting on reading all the info-boards so I may know what I'm looking at anyway, so still do whether I have a camera or not!
What stands out in your OP though is your devotion to film cameras.... which is laudable, B-U-T.... they have always demanded a shed load of user-involvement.. and compared to current generation of click & go widgetals, ever so much more so.
On a family holiday or day trip, I would be very sanguine about lugging one of the film SLR's about with me.... more all the necessary film! Whey-Back-When, I spent five weeks trecking around India.... in them days you could pick up film at any tourist kiosk.... but to be assured of film, and of a decent quality, I think I took something like 25-rolls with me.. approx half-a-roll a day! I think the film used more space in my baggage then my cloths! Certainly more than the cameras! and, yup.... lots of time spent 'faffing' with the camera NOT seeing stuff!
These days, the number of shots you can get on a couple of SD cards, would certainly make the idea of lugging that weight and volume of picture-making-paraphernalia around, then the IQ & versatility of even a smart-phone vs that of a DSLR would make it a very much harder argument, to justify packing the film-loaded big-guns! Especially for an extended trip anywhere.
Theft? Well, coming from maple-muncher-land, I can empathize.... its a rather insular and paranoid country, and anywhere there's more people than trees can seem rather scary.... but Theft? Of all the risks of travel, especially of easily grabbed high-value items, it probably is relatively high on the list... but it's far too easy to ramp everything on the list right up the rankings and over-estimate how likely it is.
Fear has a habit of doping this, whether you are considering carrying a camera through a shopping-mall, or riding a motorbike in the mountains, or parking a posh car in the street... but remember, MOST accidents and thefts, actually happen in the home! You are, actually safer when out and about, than in your own bed! But you 'feel' a heck of a lot more vulnerable! And common sense, can go a long way... (even though it's a bit of a rarity in a lot of the world, I've found, but peculiarly more so on the North-American Continent... although since most of my forreys there have been with my Knook Father, who single-handedly, probably brings the continental average down an awful lot, probably doesn't help! Lol....He's a retired college prof.... "Any-one seen my glasses?"... if not on his bald spot, he'd probably sat on them.... I got VERY good at fixing rim-less spectacles with fishing line and a pack of motel-matches, in my teens... between putting out fires in holiday chalets and stuff, I can tell you! Lol! But still!)
Basically there's a good argument both ways; and some-where in-between lies the happy-medium. A lot of camera gear and some-one more engaged with messing with that can make a trip an utter pain for others on the journey, as well as camera-geek lugging it about, actually hampered by so much 'stuff' not getting photo's with it, and some-one with a consumer camera-phone or compact, can get as many or more 'as good' or 'better' shots with that for a lot less faff and hassle. BUT all comes down to that common sense thing, and putting things into proper perspective, weighing stuff up on facts not fears, and applying common sense.