Dog ice cream: Plenty do like it, I wouldn't bother for mine but innovation in dog treats is quite handy, we now have a variety of liquid and paste based treats that are very handy for training rewards and enrichment.
Dog bubbles flavoured with bacon: Not a big fan of teaching and encouraging dogs to jump and snap at stuff floating about in the air personally, but then if its giving a dog something to do when the owner won't bother walking/doing more interactive or effortful play/training, its better than nothing.
Dog beds for the car: stops the car getting hairy/muddy/scratched up. Can't really see the problem here.
Dog Prams: Great for injured, disabled or elderly dogs.
Dog carriers: Slings and some types of carrier (bike carriers for example) great for getting pups out before they can go on the ground or before they can walk far. Also good for taking small dogs out for long days out where they might not be fit enough for that amount of exercise - ditto elderly/disabled/injured.
Some carriers are thoroughly unsuitable, some are misused, such is life really.
The 'hairy pound' (pmsl) is a big deal, its the industry I work in and theres billions in it... so there are absolutely products like 'Pawsecco' - non alcoholic 'wine' for dogs/cats that are thoroughly unnecessary and simply exist because enough of the market will buy them.
I don't really care unless its actually harmful - the myriad shock collars, prong collars, devices designed to help the owner force the animal to comply - the ultrasonic devices that claim to be 'harmless' but subject the dog to high pitched sounds that cause real pain - the laser pointer toys that easily trigger obsessive light/shadow hunting and super high stress levels in dogs (imagine chasing something you never ever catch!) (and cats) and are also linked to triggering epilepsy in dogs.. (and now, well, last I checked, you can buy a pet cam that lets you 'play' with a laser pointer toy with your dog when you're not even home, wow.. fuck up your dogs mind whilst you're out, great stuff!
If a product isn't for you... move along. It isn't causing you any harm. There are tons of products out there I fail to see the point in that part people from large sums of money - wine - make up - various skin care products with made up sciencey sounding ingredients... but other people like them!