Is it really necessary to do confinement or is it just a Chinese practice?

The elder folks believe that confinement is absolutely necessary in order for the body to recover. However, I found that some confinement rules were difficult to adhere to and didn't make any sense. I amended the rules and did my own confinement. I bathed daily, sometimes twice or thrice a day with confinement herbal water, ordered confinement food delivery and drank lots of red dates and longan tea. I also did jamu massage for 7 days. I also didn't wear socks and walked around a lot, contrary to the rules. I'm feeling fine with no pain or ache in my body.