I don't disagree, but it could be incompetence rather than laziness on the food side.
My husband, ILs and parents all take a far too casual and faffy attitude to feeding my son.
He's far more interested in playing than food, so you do need to concentrate and model it to him - sit down with him and eat it too, whilst entertaining him enough to keep him sitting. Otherwise he gets hangry and upset.
IL's will make a grand performance of sticking him in his high chair, then chat amongst themselves whilst he's waiting to eat, don't eat lunch so he's got nobody to copy, and generally don't give him the 20m focus he needs to eat. My parents treat it as "babies don't eat much", and just expect him to snatch bits of other's plates. Husband prepares him meals and snacks, but doesn't sit him in his chair or eat with him.
All of them treat any subsequent hanger as "babies grizzle, it's normal".
Meanwhile he stuffs his face at nursery and I get 2.5 meals and snacks into him on my day.
That said, he's never gone thirsty on anyone's watch.