Just because a team makes every attempt to get the right players doesn't mean they'll succeed in getting them, and so far this season the Cavs have shown that they don't have what it takes as a team to get it done, either due to injuries or inconsistency. Lebron had a monster Finals performance, and made it a respectable series without Love or Kyrie and no one else playing with any kind of consistency. Lebron's teams over his career are a perfect example of how a great team really can't be forced or bought, it has to happen organically the way San Antonio and Golden State have built their teams. It doesn't mean that a surplus of talent can't get it done the way the Heat did, just that it's far from a guarantee that it will get it done. Chemistry between the stars is more important than anything and the Cavs haven't shown an ability to sustain that, though I do believe that if Love and Kyrie stay healthy between now and the Finals this conversation will change greatly. They were 40-5 at the end of the season into the playoffs with all three of them healthy.
And aside from the 2011 Finals, all of Lebron's playoff and Finals losses boil down to not enough help. It's beating a dead horse at this point so no one wants to hear it anymore, but that doesn't make it any less true.
EDIT: Also it's not like Stephen A. is saying they need to go out and get another star, just that they need a reliable shooter, and they do, but that can be Kyrie or Love or both. Kyrie needs to get his legs under him, and Love needs to find his confidence and be told what his role really is with this team, which should be to spread the floor as a 4 and pick and pops with Lebron and Kyrie. If they play a zone D in a relentless way like the Heat did and keep moving they should be able to cover up Love's weaknesses on D.