Congratulations on your baby.
Yes this was a huge problem for me with first baby 2018. With hindsight I think it contributed massively to post natal anxiety. In my mind whatever I did was wrong.
I can only give my personal experience. Somewhere in you is your instinct, mine ended up squashed. If you can read the guidance and understand the dangers and advice you can make an informed decision.
Some of it is important. For example babies should be put down on their back. Even that you will get people who say oh mine slept on their front. That guidance is not something I would ignore. Same goes for car seats, safe sleeping etc.
Sometimes I smile and nod along, other times I ignore, sometimes I don't even answer, depends what it is.
Some of it is a parent thing in general. It happens all the time, best nappies, schools, rules, screen time etc etc.
You make the decision right for you and your baby based on the guidance given. As long as it's not dangerous just carry on.
A sensible lady said to me that it doesn't matter what others did, your baby has never been here before and nobody has raised her before so nobody knows what works best for her.
I've never reached a level of confidence to argue with health professionals so I just tend to ignore and make my decisions. For example I now have dd2, I gave a dummy fairly quick, that was questioned. I knew from first baby she settled better with it, this one likely to be the same. I just carried on.
Whatever you chose someone somewhere will have done differently, that's just life.