Both solo and duo in Battle Royale

Ea why do you put solo for one week and duos the other week. Like why not put both of them forever? This way we'll be so much happier cause this is so annoying. And like why do you even do this? You don't get any benefit by putting only one of them and the only thing you achieve is making us wait a whole week to play our favorite mode for no reason while you can put both of them on simultaneously