Yes, nothing reads more boring than the repetition of the same words over and over again. Example:
He walked down the street, looking over his shoulder every now and then. Then he turned into Madison Avenue and walked faster, no longer looking for pursuers.
Can you spot all echos? There are three, not counting repetitions of ‘he’ and ‘the’.
Echos really bog down the prose. Everyone seems to agree. At the same time, ironically, there’s a tendency to only use ‘said’ for dialog tags, banning even the innocent word ‘asked’, not to mention phrases like: she added, explained, cried, shouted, whispered, murmured…
Oh well, just a fashion thing, I hope.