Yes, genericization is not actually a risk that aggressive lawyers can help you with, except in the sense that if they bankrupt you now it's not a problem any more.
Genericization occurs when more or less everybody uses your word mark instead of a generic product class. But you can't actually sue everybody. And if you chase say, popular media, it just becomes a joke - Stephen Colbert can't use the word literally everybody you know uses because his bosses will get sued, ha ha, but it doesn't stop you and it won't stop genericization from happening. Notice you won't find any courts checking that you spent enough on legal fees as otherwise you lose for inadequate enforcement. They only care that ordinary people, who you wouldn't sue anyway, used this word in a generic way.
Beyond that, it's not at all obvious that this is a problem you'd want to prevent. Why are Kleenex and Xerox so well known? It's surely not because they're unsuccessful!
That's a myth. It suits trademark lawyers and aggressive owners to pretend this is obligatory but it isn't.