Because some sites can be really annoying about a user using adblock software. They can force you to disable adblock by hiding everything until you do so. Nice sites will just simply ask that you enable it via panels below the intended adspace. In this case, this script is only fighting against FuckAdblock's adblock detection methods.
I don't mind seeing ads sometimes. I do realize this is where hosts and content producers get their funds. I would much rather have sites where you can pay subscriptions to allow access to not only ad-free content and additional premium content as long as the site actually has quality content that I will constantly come back for. Places like WolframAlpha and I'm told Chegg have quality content behind their fees. Also, another thing that is quite annoying is hearing the same ads over and over again. Streaming services have this issue all the time.
I don't mind seeing ads sometimes. I do realize this is where hosts and content producers get their funds. I would much rather have sites where you can pay subscriptions to allow access to not only ad-free content and additional premium content as long as the site actually has quality content that I will constantly come back for. Places like WolframAlpha and I'm told Chegg have quality content behind their fees. Also, another thing that is quite annoying is hearing the same ads over and over again. Streaming services have this issue all the time.