You have to go out of your way to use any of the crypto features. None of them are forced on you any more than the built in TOR/IPFS/BitTorrent clients. It's just there if you want it.
I don't know what else to tell you, you're not even paying for the browser, it's a free service. Any browser that implements an ad blocker is probably also going to have a lot of features you don't use
Just to vouch for this, I've been using Brave for many
years. Haven't done a single crypto transaction in my life. Whatever crypto features it may have don't get in the way at all.