There's no reason to have your own mint other than education. Cashu only gets a privacy benefit if multiple people are using the same mint, and furthermore, holding a non-zero balance. If it's just one person, you might as well use a much simpler lightning wallet.

And yes, I use cashu wallets a lot myself for small LN transactions like tipping on nostr. People need to actually use it and hold a balance on mints for everyone else to get a privacy improvement. I'm happy to put ~$100 at risk to contribute to that.