In the beginning of The Best..., the Borg actively looked for the Enterprise to get Picard and make a Locutus out of him etc.
What if they hadn't fount the E-D (or Picard wasn't aboard)(or Picard had died between J-25 and then? or married Lwaxana and went off to Betazoid? would the battle at Wolf 359 be won by Starfleet? Would they even try to sector 001? Would they Locutus someone else? that someone certainly would be less competent than Jean-Luc.
What if they hadn't fount the E-D (or Picard wasn't aboard)(or Picard had died between J-25 and then? or married Lwaxana and went off to Betazoid? would the battle at Wolf 359 be won by Starfleet? Would they even try to sector 001? Would they Locutus someone else? that someone certainly would be less competent than Jean-Luc.