it's not just for """patience"""
ads can potentially have malicious software, some can be NSFW or unfiltered in general, and also since it's a marketing thing they're trying to do every trick in the book to make you waste money on the product they're advertising
if you get rid of ads, you're reducing the chance of getting a computer virus, getting grossed out by inappropriate scenes, and most importantly, saving you money (and time, now that you mentioned it)