Yes, but that's only the beginning of the story. People gaming metrics is a type of security problem, in that "attackers" try to game the metrics while "defenders" try to make them less game-able by improving the accuracy and precision of how the metrics are gathered so that the final numbers continue to tell a valuable story over time.
The issue isn't that metrics can be gamed; it's that organizations which pride themselves on being data-driven rarely make the investment in hiring blue teams and red teams to defend and attack the metrics. If you appreciate that investing in cyberdefense is key to protecting your company from cybersecurity threats, why can't you appreciate that investing in "metricsecurity" is key to protecting your company from "metricsecurity" threats?