You can't just shrug that off like it didn't happen. The story doesn't end with those endorsements. It's a non-issue for you, it's not for Warren and other people, this is why Bernie is getting heat right now. He didn't take those opinions into consideration. No, it's not just "record" we're discussing a person here and he's not as squeaky clean as you're framing him as on these issues.
I'm not sure how to word this but this is kinda my only real gripe with Bernie and more so with a lot of his more ardent supporters. Bernie comes at literally everything from this weird cut and dry "this stems from this, this stems from this, we do this and everything's solved" type scenario and then everyone else is stupid and wrong foor not buying it. I felt the same type of thing when trying to argue that, no, our entire foreign policy is not straight up because of defense contractors and that solving that would not all of a sudden turn us into Switzerland or some shit.
By all means I think Bernie's policies are the best, and for sure Medicare for All would more or less do what Planned Parenthood always wished for and possible render the whole organization moot, assuming one of the compromises to get it passed in that hypothetical scenario wasn't no federal funds going towards abortions or some shit, but this idea that simply implementing his policies is the end game for all of these organizations and people working in them and they're all wrong for not having to think pragmatically or make their own choices until this future comes about is really annoying to me. It was the same with that Working Families Union endorsement he lost to Warren this election, all the left wingers are saying they voted themselves into irrelevance over a primary endorsement, it's fucking stupid.
Most likely, had Bernie won in 2016, or if Bernie or Warren win in 2020 the vast majority of their policies aren't going to get implemented. I of course think they should try and we should try and create a situation on the ground that'd allow it to happen but all signs point to not happening. So in that environment, if you were planned parenthood for example, having a woman in the Presidency would be a bigger win for your policy positions than an old guy who'd also support your shit but isn't an icon you can hold up to other women, and, being honest here do people really expect Bernie to fight as hard for Planned Parenthood as a woman would?
I'm not trying to say he's not sexist or is sexist. I don't know. I definitely don't put it past a man to be sexist so I wouldn't be surprised if he was. But I think his failings in this regard appear to have more to do with just being so 2 dimensional. Which I find a strength but only because I don't deify any of these people and I don't take any of this personally in the sense that I don't care who endorses who and am actually fine with everyone going out in their own directions making their own choices before an election in how they best see fit. I respect that. The people who drink the far Leftist koolaid seemingly don't.
Edit:
Also I think for all the talk about the DNC screwing Bernie over the thing I find most hilarious about all of that is that they let him in the debate in the first place! Switching parties just to get a national platform, I don't think the DNC had to respect that and let him in.