I agree with you. There are several major games that transmit all player info at all times when it's really not necessary and makes "ESP" style hacks possible,

I agree with you. There are several major games that transmit all player info at all times when it's really not necessary and makes "ESP" style hacks possible, which can be supremely unfair. Developers would rather tack on a rootkit than make engine changes to resist this kind of cheating.