Oh dear - let's be honest gransnetters, dogs are not allowed everywhere despite your observations - this is a gross exaggeration on the part of those who are just too finicky. There are lots of restaurants, shops, hotels etc that do not allow dogs. It's their choice, and yours too. Having spent much time in a hospice environment where dogs were brought in specifically as therapy animals, I can vouch for the fact that all dogs lick their nether regions whether they're considered fit to be of service to dying humans or not, and given the hygiene protocol in hospices (particularly during covid) it would seem that if dogs were unhygienic they would never have been allowed in. Likewise, guide dogs behave the same way but I'm quite certain that if any gransnetters were sufficiently unfortunate to need an assistance dog in the future, they would soon change their tune and expect their animal to be able to accompany them anywhere. And why not?
As for asthma, it has been demonstrated in the Middle East, where some countries have become very 'hygienic' as a result of increased wealth, that infantile asthma is associated with the lack of exposure to dogs and cats, and to carpets that house a multitude of bugs, all of which build immunity.
I do agree that training of dogs is important so that they respond to the owner's command. It would be nice if humans could also be considered in this way. Personally, I'd far rather sit in a cafe with several well-behaved dogs sitting with their owners and alleviating their possible loneliness than in a cafe with a dozen bean bags and noisy kids who don't pipe down when their parents tell them to, or indeed a cafe with loud people who have no regard for the fact that others might not want to know from where they bought their latest item of clothing, or where they're planning to go on holiday. So I choose where I go.
Am I a dog lover, oh yes, living on a farm I'm in close contact with four dogs, all trained and one trained as an assistance dog. Dogs are what their owners make them. None of the family suffers from any allergies interestingly - perhaps that's proximity to huge biodiversity. Seriously, our environments are becoming far too clinical for our own survival. So gransnetters, the next time time you're in a place where there's a dog, try asking the owner if you can stroke it.