It's not "splitting hairs", it's being accurate.Biden absolutely said that he wants to divert funds. Split hairs all you like.
Biden HAS said he wants to optimize mental health in conjunction with policing, but he has at no point said he wants to "defund" or "abolish" the police, which is why trump looked so befuddled when it turned out that wallace caught him in a lie. He wasn't expecting to be held accountable by state tv.
Frankly, I'm a bit surprised that trump does NOT want to defund the police! Considering all his shady dealings, bragging about sexual assault, etc, you would think the last thing he would want is to have more police around. Go figure!