A parent's role is to protect their child and to do what they feel is in the best interest of their child. Some choose to limit / control visitors in the early days. It is very tough for those full of love for the new family member, their child's child, and who are having to wait.
It must be overwhelming for new parents now..so much advice available .. and at the touch of a button.... so many experts ..some real some quacks... advising about bonding, health, feeding, sleeping, swaddle don't swaddle, etc. etc.
I was quite naïve when I had my babies and there really were very few people giving advice.. Dr Spock and Claire Rayner ..I chose down to earth , no nonsense Claire's book & welcomed support and help from the 'wise women'..my mum and mum in law and a lovely health visitor!