star trek - Would it really matter, if Odo had never contacted The Great Link?

Close to the end of Homefront episode, we hear, that captain Sisko says, that it would be much better, if Odo would never found The Great Link and other changelings. Odo agrees.

How could that be true? What would that change? The Dominion / changelings / The Great Link was a super power in Gamma Quadrant, responsible for destroying or acquiring hundreds of other civilisations and always hunger for a new expansions. For me, it would change next to nothing, if Odo would ever contact The Great Link, because I assume, that Dominion invasion to the Alpha Quadrant was always just a matter of time.

Not mentioning, that it wasn't Odo's decision to seek for The Great Link, as -- if I remember correct -- that desire was "implanted" in him by The Great Link and was actually initiated / required by The Great Link to force Odo (and other changelings sent "away") to return home. Not mentioning, that if Odo wouldn't find their relatives, he wouldn't be able to provide Federation with all the information he has possessed by each join with The Great Link or any other changeling.

So, to me, words spoken by Sisko are completely wrong and the fact, that Odo agrees on them is screenplay hole.

Am I wrong in above assumption?