I think age discrimination laws actually hurt older workers because companies don’t want to hire them and incur the litigation risk. And after this case Google would probably think twice before deciding even to interview older people.
What? You can't actively avoid interviewing people because they belong to a protected class. That is very much still discriminating.
If your logic holds, Google would actively not try to interview people at all, because Race, Origin, Gender, and Military Status are all protected classes with anti discrimination laws.
Also despite what crazy MRAs claim the courts have been working to correct gender imbalance that favor females. I can think of a couple off the top of my head - a case that involved male military spouses having to prove they were financially dependent on their spouse in order to receive military benefits and one that involved social security surviving widows getting survivors benefits but not widowers. Both were successfully argued and ruled unconstitutional.
Besides your logic makes absolutely no sense - "I'm going to discriminate against a protected class to avoid lawsuits accusing me of discriminating against a protected class."
It's so often forgotten that the intent of the law vs its actual effect could be in conflict.