We should not give unnecessary suggestions to other people without knowing the problem fully. What is our level of understanding of that issue and what is our actual knowledge in that subject? These things are also to be studied. Once we feel Ok only we should suggest otherwise we should keep silent.
Going to a doctor is to get the problem diagnosed and suggest medicines. If we have an old history and the doctor is new we should tell him the history so that he will know the history fully. But we can't tell him to prescribe the same medicines or we should not tell him what medicines he should prescribe.
Regarding doctors, they now almost practice the same set of procedures of diagnosis by first referring you to a number of tests and then based on the reports advise you of probable problem and medicine. Although this does not apply to experienced doctors, they can detect problems from symptoms itself.
In case of medical issues we must be wary of out tongue and experience as it may fail when it comes to diseases. The best burning example here is COVID 19. All the theories till date have failed regarding COVID 19 and still the vaccine is nowhere to be seen, only advises and precautions are floating and those too are changing frequently.
Live before you leave.
As for as suggestions/advise concerned, we should see the recipient. Suggestions and advises should be given only on request or needed by others.
And, otherwise, it is always better to know yourself, your potential, knowledge or calibre in any situation so that you know how to react to particular people, circumstances or situations.
'Mastering others is strength. Mastering yourself is true power'. -Lao Tzu
I always refrain from advising my youngsters if they appear to be reluctant to welcome any suggestion from their elders.
What is the point to receive silent indifference from these young people who respect us too.
As far as suggestions to any doctor or advocate or any other professional is concerned is nothing but stupidity.
Knowledge is power.