the.com/safety net

means A backup system or plan — financial, social, or physical — designed to catch you if your main effort fails.

from Literal before it was figurative: a net rigged beneath trapeze artists and tightrope walkers, catching anyone who fell mid-performance. The physical rigging dates back to circus and acrobatic traditions; the metaphorical sense — welfare programs, backup plans, anything that softens a fall — took off in the 20th century, especially in political language around social security and public assistance. The image does the work: you still have to do the risky thing, the net just means death isn't the downside.