> This means that many papers citation list is not a result of a thorough literature search
Related work sections aren't typically thorough, that's what lit surveys/reviews are for. It's also not a new phenomenon that highly cited work gets cited because it's highly cited, i.e. work is cited simply because it's more readily noticed. It's furthermore common for the same research to arise independently in different fields, with different terminology, i.e. bodies of research are somehow not found. So, no need to be scared, it's nothing new.
Related work sections aren't typically thorough, that's what lit surveys/reviews are for. It's also not a new phenomenon that highly cited work gets cited because it's highly cited, i.e. work is cited simply because it's more readily noticed. It's furthermore common for the same research to arise independently in different fields, with different terminology, i.e. bodies of research are somehow not found. So, no need to be scared, it's nothing new.