Knowing how to grapple will help your standup by: teaching you to defend against takedowns,knowing how to escape bad positions so you can get back on your feet,etc.
Look at V.Silva: A BJJ purplebelt but mostly a Muay Thai Destruction Machine.
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Justice, swift & raw. US Constitutional absolutism, a return to the American Dream based on the 10 Commandments, The Golden Rule, US Constitution & Bill of Rights, zero tolerance for bloodsuckers, criminals and evil.. Peace through superior firepower & tactical might, zero free rides, only the truly needy get jack****, Don't Tread on Me & Remember the Alamo muther****er