Exactly. Last week the Saints were willing to trade at least 3 first round picks and players, and take on an insane salary. If they thought there was a player better than Winston available for some picks and/or players, they would have done it. Watson was worth it in the Saints' eyes. But also we know now that no other player was worth giving up a pick to obtain in their eyes as well.
This isn't hard if you're not trying to rationalize your opinion.