A thing you need to know about baseball at the JC level is that it too comes in many different flavors -- from super, duper competitive to less so. Some JC teams are stocked with guys who have foregone 4 year, D1 schools, because they want to re-enter the draft quickly and not wait 3 years. Some JC teams are stocked with guys who maybe lack the grades to get into any decent 4 year school, but definitely have the baseball talent to play at a very high level. There are also guys who defer admission to, say, an elite D3 school with a decent baseball program, because they want to take one last shot at getting recruited by a D1. Some JC schools regularly send guys onto 4 year programs. Some don't. Plus as somebody said above, 100's of players may show up for fall tryouts at a JC. Many of them will have been very strong players in HS.
"being good enough to play JuCo ball" is not a single standard. And there is bound to be LOTS of competition at any decent JC baseball school.