There are lots of ways to skin a cat. I actually like high frequency for beginners. You can get enough volume to grow and max time under the bar to practice the movements while staying far away from failure but still being moderately heavy and challenging. Form breakdown can come because of just weight OR intensity in a set. So, who is going to have more form breakdown and risk of injury, the beginner squatting for 1 set of 5 at 135 but 5 days a week, or the one squatting for 5 sets of 5 at 135 1 day a week? The overall volume and workload are the same, but the guy squatting 5 days a week is going to have better form. meanwhile the 4th and 5th set of the 1 day a week guy may be getting ugly.
Again there can be problems with the high frequency. The bigger problem is that beginners will watch bodybuilders or normal powerlifters pounding away at the volume/intensity in a session and copy that. In that style training each session is do or die 1/4 of a month worth of importance. You cannot approach high frequency that way. Daily training is a clock punching job. A roofer carrying shingles all day is never going to sniff ammonia and load himself to the breaking point for an all out live or die effort. He's going do keep a moderate load and keep on plugging with the knowledge that he's going to be back doing it again tomorrow. And over time his loads are naturally going to go up and he'll start being able to get more work done. You have to have a different mind set that is very different that what typical training is like today. But, with that approach there is nothing wrong with high frequency at any level.