Innocent, law abiding people are the ones who need Monero (XMR) the most. Not criminals.
While on the surface it is easy to assume privacy coins like Monero are most useful for people who do unlawful things, that is is only one very basic way of looking at it.
Completely innocent "squeaky clean" people who use cryptos with transparent blockchains have often have no control or knowledge of exactly who they are transacting with. They can easily trade or receive coins that are connected to "shady" people or deals. Any innocent people caught up in this may be forced to fight to prove and maintain their clean reputation. Why risk having to go through that?
Using completely fungible privacy coins like Monero ensures that no matter who you transact with, you can not be "guilty by association". You can transact fairly without ever unknowingly putting your reputation on the line. This feature protects innocent people and brings great value to the crypto space.