That's because some people confuse spacing with turtling or they think both terms represent the same concept. Turtling is looked down upon in general because it is considered a form of cowardice.
I don't see why. Whenever I play, I just wait for my opponent to make a mistake and punish them for it. There's nothing wrong with being defensive
Turtling and spacing are legit tactics, not the person's fault the other cannot process a counter tactic to it. Sore losers.