Bernie was on every ballot. I voted for him, twice. The fact that he didn't win means nothing more than he didn't win. He had the opportunity, the voters simply didn't vote for him.
Maybe so, but Democrats didn't turn out to vote for him in the primary, even though they had every opportunity to do so, in every single state. Kinda makes your whole point moot.
... But people DID have a choice. They could have voted for Sanders or Clinton or Biden or... fucking Yang (look... he was advocating for nuclear power and UBI).
So how would we "get a choice" if the primaries were skipped in favor of Sanders because people chose not to vote?
And before you say "Well, how was that fair with Kamala": That is actually a common refrain. And I genuinely don't know what we could have done (I mused on it elsewhere in the thread) considering how fast everything had to come together. And a Biden who dropped out earlier in the year would have just fueled countless "Even the Democrats know they failed" messages
And before you say "Well, the fucking super delegates meant that Bernie never had a chance": And how would we have been overriding the will of the Democratic party? It wouldn't be the ordinary delegates...