I’m scheduled for knee replacement but read so many negatives ?

Im having full knee replacement very soon and researching I read so many negatives so for all of you who have had it, is it worth it ? I’m definitely concerned that I’ll be worse off by reading so many problems with pain, swelling and movement with knee replacements and maybe one should just put up with what we deal with now than adding pain and swelling into the mix.
Any advice would be much appreciated.