Why Celtics' Jayson Tatum, Evan Fournier played even though the results didn't matter

The Celtics blew out the Timberwolves even though they sat most of their starters.

Why Celtics' Jayson Tatum, Evan Fournier played even though the results didn't matter
The Celtics blew out the Timberwolves even though they sat most of their starters.