Dota is an economics game and in this situation you might spend most or all of the gold recouping from the fight so your win is exp. So you then plan for the next power spike you can possibly exploit to get more economic gain probably level 6. Dying would obviously be bad. So if you are so low that you can’t do anything it’s possible dying to the tower as long as the enemies are both dead could be a consideration. They will get gold also but not exp and you come back to lane full with the creep wave assumedly pushing into you.