Typically, I'd agree that it isn't a proper barometer in a vacuum, but in this particular comparison, you have to compare apples to apples.
For starters, I only count 4 (Schofield, Williams, Bone, Fulk) from that 2016-17 team, not 5, and they were sophomore, freshman, freshman, freshman. All of them needed development and Fulk only played 10 games, so go ahead and throw him out.
In my example, McRae was a senior, Maymon was a 5th year senior, Stokes was a junior, and JRich was a junior. McRae and Stokes had already been All-SEC players the year before. Maymon, though zapped by his injury that forced him to redshirt the prior year, had been All-SEC the year before that. That 2013-14 team also had Robert Hubbs, whom I neglected to mention for the same reason as Fulk. He only played 12 games because of injury.
You also have to consider their recruiting rankings...
McRae ☆☆☆☆
Stokes ☆☆☆☆☆
Maymon ☆☆☆☆
JRich ☆☆☆
Schofield ☆☆☆
Williams ☆☆☆
Bone ☆☆☆
Fulk ☆☆☆
That first group of players was a little more ready-made to begin with. Three of them were top-50 players, and then were also on the tail end of their careers.
Using your example, the second group as a sophomore and 3 freshmen, knowing they would take time to develop is a little misleading. In my example, 3 of the 4 had already had All-SEC seasons.