That's not true at all.
People are giving advice based off experience - there are so many breeds that people think make a good family pet and are 'perfect' for their family, that actually they have no business owning. Some idiot on another thread once recommended a border collie for a first time dog owner (absolute muppet).
OP has admitted she never had a dog growing up. She didn't initially say what age her children were etc. Therefore people have made recommendations based on some (incomplete - not necessarily OPs fault as she didn't know what information to provide) information. She also said she didn't want a dog that needed long walks, or shedding or lots of training - something many many dogs need. Even the most pointless of dogs needs stimulation - otherwise you get significant behavioural issues. In other words - OP is a complete novice (which is not necessarily a bad thing). She has had advice that reflected that.
Some PPs have also made valid points about not leaving a dog in the garden alone. As someone who has not had a dog before, OP does not necessarily know that leaving a dog in the garden alone for hours on-end (particularly a young one) is a recipe for disaster. Other than likely destruction of the garden, you have serious issues such as the dog potentially digesting something toxic, being stolen (an increasing issue) etc.
People are also (wisely) urging caution. A dog is a 10-15 year commitment and, as a first time dog owner, OP needs to know the risks/commitment she is taking on alongside the significant costs.
There is a LOT of naivety on this board from owners who think dog ownership is as easy as ABC - and it's really not.
OP may not be as naive as some, but recently we've seen a woman who's scared of dogs considering getting a chihuahua (ffs one of the most aggressive breeds if not properly trained) and ignoring the fact that it will need walking in places where other dogs will be. We've seen people who have got a dog who then can't cope with toilet training and mouthing and are looking to rehome (a puppy that was 5 months old - where mouthing is like the ONLY thing the pointless little cretins do). We also saw a woman who didn't want to get insurance for her dog as she couldn't afford it (what the literal hell was she doing).
So, posters on the Doghouse are rightly concerned that people understand the significant impact/cost/commitment a dog has lest we end up with more total idiots getting dogs that should never have got one.
Some of the posts may have come across as more prickly that necessary - but that is the issue with typing as a form of communication rather than face to face conversations.
All posters on this forum want is to ensure that the right people get dogs and go into the process with their eyes wide open. Too many dogs are bought for the wrong reasons ('low shedding' or 'good with kids') and have a bloody crap life because of it.