I grew up with big dogs, so I'm generally comfortable with dogs.
I accept dog owners can be caught out and if they are clearly responsive/ appologetic, I'm pretty forgiving. I was running in a quiet field a couple of weeks ago and there were some big dogs, burning off energy off-lead. One did chase after me and get bouncy. I slowed to a walk. The owner was trying to get attention. The dog came back when I tried running again. This time the owner was more successful and got the dog in the opposite direction with the ball. It was a sensible quiet place for the dog to be off lead, and the dog was in a energetic state. I'd be less forgiving in the local woods where there is a regular flow of people.
I was also forgiving when a dog bowled over DS2 whennhe was 3. The dog was playing with its own young family member. The owner came straight over and was very appologetic unfortunately that and so many other incidents of bouncy "friendly" dogs including 1yo DS1 having food wrestled out of his hand while sitting in the pram (not even a low buggy) and both DCs now have a well-ingrained fear.
It's astonishing how many dog owners will ignore obvious fear in another human and blithely shout "it's OK, he's friendly!". I now answer back with "my child isn't". At 7 and 10, they should be able to walk away from me in a public place without being put into fear because of feckless dog owners. So many phases of progress at standing still or even gaining confidence to ask if they can stroke a dog have been put back by the next bouncy, "friendly" nuisence.
It is worth noting that the law includes others' distress innthe definition of control.
I never want to be jumped up at by a random dog. I accept mud below my knees when walking, but not on my coats. There are several local dogs that I dread seeing because of their behaviour and their indulging owner. When I challenged one owner and told her to put it on a lead because it had now jumped up 3 times within a couple of hundred metres, she complained at me for scaring the dog... I was walking solo, pokemoning and had just firmly told the dog to get down with teacher voice 
These types of owners ruin public spaces for everyone else, including other owners.
I think it is a growing problem. Partly anthropmorphisation and mis-guided indulgent love. Partly that there are more difficult rescue dogs being rehomed after poor experiences, plus the idiots that get dogs, ruin them and then pass them into the rescue system when they don't cope.