Every parent wants the best for their child. They want to make sure that their kids get the best education, childhood experience, friends, extracurricular activities, and anything else that would help their kids grow up healthy. The methods parents use range from letting their children become more independent to completely controlling their lives in every aspect possible. Many parents resort to more stricter methods to prevent their children from going "bad" and rebellious however the extremities of strict parenting can cause to major backfires. Parents that slack off on parenting their child often leads to the lack of love given to the kid which causes the kid to grow distant from his/her family and going down darker paths. Many parents fear this and would assert excessive control over their kids to prevent their child from going down these paths and hope to push them forward to a stagnant, normal life. This would include implementing strict curfew times, limited personal space, permission to leave the house, relationship restrictions, etc. All of these combined would make the parents feel like they're protecting their kids from the harmful things out there, but in reality, they're causing terrible damage to the natural growth of a kid.
Parents become strict because they want to protect their kids and think what they do is the best for them. There's no parent that doesn't love their kid, but when it comes to how to parent their child they become very selfish about they're love and believe their way of loving their child is the best way for the kid to grow up. This often leads to ignorance towards the child's requests, suppression of child's social life, restricting their hobbies and interests, and isolating their kid from the outside world. They believe that all the kid needs is a good education, a good guiding voice, planned healthy lifestyle, and a stable job in the future.
This kind of parenting technique hinders the natural growth a child should have. He/she can't spend the time they wanted with their friends, can't enjoy his/her free time with the people they want, have restricted hobbies and interest, become isolated and depressed from the lack of friends, have no social connections or skills, and fail to become independent because of the excessive guiding coming from his/her parents that don't let the kid make his/her own decisions. This eventually evolves to the kid being reliant on advice and decisions coming from his/her parents rather than from his/her own mind. The child may even become rebellious and angry that the parents are being so controlling of them and would often make extreme decisions just to demonstrate his/her hatred of the control parents put on him/her.
I luckily have parents that are lenient enough to give me the personal space and freedom that I desire while making sure they're strict enough to make me realize what's right and wrong. I believe that letting a child grow and discover on his/her own is the best way a parent could love their kids. Making mistakes and falling down is an essential part of growing up and a lot of the time parents are fearful that their kids can't take the hit and get hurt which leads to being overprotective.