It's their choice, isn't it? It doesn't mean if I listen to your suggestion I need to apply them. The term 'good advice' is something vague. You may find one piece of advice of a person good but that doesn't mean I also have to think of it in the same way. When I am asking for your suggestion on a particular issue and the issue becomes more complicated because of not following your suggestion you may say to others that your suggestion was not given enough credence but if you provide suggestions even when I am not seeking it from you there is no need to think that only your suggestion will be given credence. Like you, many might be providing free advice and it's entirely up to the person which advice to follow. Even if the person doesn't pay heed to any advice and decide their own course of action there should not be any fuss.
"Life is easier when you enjoy what you do"
Generally, we should refrain from taking suggestions because asking other people for suggestions reveals what we are planning or thinking to do in the future. We should not divulge with other people. It may cause some negative reaction or remark of people if we could not succeed.
Be indian and buy Indian.
'To know what you know and what you do not know, that is true knowledge.'-Confucius
In my opinion, the 2nd type maybe the people who make a decision after taking some suggestions from others and they may help others also when there is a need or when they ask for.
The 3rd type people may also make their own decision but they never help others by giving some advice. Even the other people ask them they pretend as if they are hearing but not coming out with any suggestion to the person who asked for it.
This subject is discussed earlier also. I feel we are the best judges of our situation and we only can take an apt decision in matters concerned to us. We can asl suggestions from others but finally, we should make our own decisions.