To be honest, I think these laws are necessary and I don’t really think they are too restricted. Yes it does make situations awkward (like when the doctor brings his wife and her meal can’t be payed for). But usually family members are not expected to be present during professional meetings and events, so it makes sense to me why such a restriction is there.
I think these kind of laws are made due to misuse of hospitality (because doctors and physicians can get greedy). I know that doctors and surgeons are splurged with comfort during conferences and other meetings, so they indirectly receive a lot (like a LOT!) during these educational events. They only aren’t allowed to receive gifts personally or directly from the companies. So I think doctors are enjoying the hospitality of companies regardless of these restrictions.