Lifting weights needs to be done with a purpose. Here is why.
Lifting weights puts pressure on your joints and adds tension to your muscle. It can load your spine. When perform with poor technique or form, this can hurt and cause damage to your body. This is why people start and stop working out quickly.
Using correct technique and starting with a coach allows you to know if your lifting weights properly. Also, knowing how hard to push yourself to increase strength, but not cause injury.
Then you can enjoy the health benefits of your daily activities at work, with family and DIY projects without chance of injury.