Bro from Majestic, Harohalli is 50KM and Harohalli doesn't come under Bengaluru District, it comes under neighbouring Ramanagara district, it makes zero sense to run metro for 50KM and that too outside the city limits, metro is meant for transport within same city and also there is free bus scheme for ladies, so majority ladies will anyhow not use metro even if extended, so it's pointless