Your data actually says the opposite for Europe - it's highly dependent of the country of course, but if you look at page 6, in Southern countries - Spain, Italy, you have >30% of old people living with larger family (columns 'living with partners plus others' and 'no partner, not living alone'). That comes out at <10% for Nordic countries (Finland, Sweden etc)
Three-generation house-holds or households where adult children live with their older parents are very uncommon in most, but not all, EU countries.
The numbers you cite are explained by old people living in retirement facilities or coliving arrangements, but that doesn't imply cohabitation with young people. Under these circumstances, special precautions can and must be taken.