Every language has homophones. Even before tones were created, sometimes there are just coincidences. As far as I know, there's nothing to suggest that the number four and death are inherently related in some way. No one is suggesting that knead and need are related even though they sound the same, and lead (the act of leading) and lead (the metal) may happen to share a spelling but they're still completely different words.
Small cat ( ani.social )
By capriccio,source
Chinese numbers ( sh.itjust.works )
To be fair, zero is a complicated number
Arizona abortion providers hope 1864 ban will spark change: ‘A blue wave is coming’ ( www.theguardian.com )
Providers are optimistic for a different future for abortion in the state even as Republicans flounder in their response...