"oh, oh I'm such a responsible sports bettor look at me"
for most, units are nothing more than a thinly veiled way to have action every night. if you're so disciplined, then spot bet when you feel you have a reasonable edge.
obviously doesn't apply to all and definitely not to people that put in work everyday in order to handicap a lot of games, but let's be honest - that number is low.
and obv units can just be terminology to represent your bet size, but I am speaking more about these "BR management, strict 1 unit, every night bettors"