For those stuck at lower levels of Maslov's Pyramid of Needs, they may have a valid excuse of dealing with more important issues than hobbies and activities.
But for those that are at level 5 without mental issues, if they have a boring life, it is likely due to their own poor life choices, a lack of motivation, and creativity. Not all popular life activities are positive for example a few below.
Unfortunately, the favorite "hobbies" of many USA adults beyond their working world are not negative if in moderation:
Eating excessive amounts of food and doing so more frequently than necessary.
Excessively watching others live fictional lives on television instead of living their own life.
Excessively watching sports on television.
Excessively playing video games.
Excessively drinking alcohol.
Excessively using recreational drugs.
Obsessive focus on money $$$ including gambling.
Pornography with secks.
Will start another thread with a long list of activities and hobbies since it can have have value orienting some.