Not going to happen they are generally afraid of criticism, debate or ridicule of their left leaning ideas and they especially dislike this from anyone opposing their viewpoints when they don't have any idea what the poster is really about. It's a safe space for them.
They make use of an inbuilt option in stream rules on imgflip which allows for a minimum 10000 point level before posting is possible. Whilst there was surely more than one reason why this rule was offered by imgflip creators in this case it becomes handy because there are 24hr trolls. People who come in for a day with a new user name bombing on memes and placing their own memes. Memes which probably wouldn't get onto that stream with the rule in place and because it is easily one of if not the most censored stream on here.
So by making a minimum level before you can post they avoid the newest opposing and complimentary views. This gives other users an opportunity to see what you post and how you comment on other memes. As mentioned above it's a safe space with high level sensoring if that's what you're after then I have a couple of tips which may help.
Make a meme in politics begging for votes so you can join stream or take time to reach out in comments to others on here who are similar viewpoint to you and ask them if they wouldn't mind to help you out. Or this, this is the big one, stop being a lefty all your life and make some more memes which will raise your points hahaha. If you put a few memes a day it should only take a few weeks to get to 10000. It comes around sooner than you think, my points has gone up at a bit over 10000 points a week if you consider I started just under a year ago.
You might find someone reading this comment helps you out too. Hope that this somewhat answers your problem.