The traditional form 務 showed a lance, a hand striking, and strength 力 — pressing forward with force. Simplified 务 keeps the striding foot and the muscle: business is what you push through.
服务 'service' hangs on signs across China: 服务员 is how you call a waiter. 务必 means 'must without fail' — the character still carries its old imperative muscle. 家务 is housework, the business of home.
March 夂 plus muscle 力 — the BUSINESS you must push through.
服务员! shouted across a restaurant is perfectly polite in China — summoning service loudly is expected, not rude. Whispering for the check gets you nowhere.