Why would I want to have rounded corner on clipsin the timeline?

Yay an other update........ Why would I want to have rounded corner on clips in the timeline when 95 percent of my time im trying to butt up next to an other clip? makes no sense.. if im on line 1 and butt up a clip on the edge of line 2 under it.. theres a huge space because its rounded.. why would anyone want this.. how do I change it back.. please.. tell.. me.. theres a way.. Yeah I get it a bunch of weirdos requested rounded edges.... but I have no idea why.. guess im missing something..