It isn’t the existence of those that bothers me, it’s the number and density of them at the beginning of TFA that I disliked. Had they been more spread out, and/or with a couple of them feeling less coincidental, it would have been far better.
STAR WARS had a lot of plot conveniences
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R2 and C3P0 happen to land somewhere conveniently on the side of the planet where Luke is
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Then later when they’re separated they somehow conveniently meet up on the sandcrawler so they can be sold to Owen and Beru
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Then the other Astromech poops out conveniently so that R2 can be purchased
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Then Luke somehow conveniently finds part of Leia’s message while cleaning R2
and this doesn’t necessarily bother me because it’s just one of those things that has always been in Star Wars.