The Spaniard has endured an indifferent spell as the Hornets manager since taking over from Marco Silva in January.
The Hertfordshire club are notorious for rotating their managers, but Kabasele believes it'll be more beneficial to hand Gracia more time.
Kabasele said: "For sure it is easier when you can work many years with the same manager and the same players.
"But in some moments the board is making some decisions. We have to respect what the board has said and our job is to be good on the pitch."