Fortnite PC vs mobile

This makes me question the people who are on the mobile Fortnite. Fortnite requires a good ass mobile phone and most very good phones cost like 800-1000 dollars (iphone x, galaxy whatever, etc), why waste 800-1000 on a phone when you could spend that on a computer and not just play fortnite but open up to the ENTIRE world of gameslike h1z1 BR,pubg, etc etc.