Plants also uptake nitrate and ammonia, and at least with my bioload, it's possible for me to bottom out on nitrate in the tank during the week as long as the plants are growing well even with fertilizers being added that contain it. It's not like nitrate is running amok in my tanks. And nitrate is only one reason to do water changes.
I am also just a bit dubious of marketing approaches that could be called a form of "negging". Such as the "you aren't fully cycled unless you use biohome" line. I'm not losing sleep over my nitrate levels or water change frequency, any water quality issues I do have are not going to be solved by it, and biohome isn't offering up evidence of effectiveness, I'm okay with what I've been using.
It's healthy and wise to be skeptical. But, I assure you, this media works.
Glad you aren't losing sleep over doing frequent water changes; but I'm not in that camp. I prefer the low-tech/no-tech/Walstad approach that advocates less water changes. And my water quality is just fine.
What evidence of effectiveness do you require before trying it? The microbiology, behind how anaerobic bacteria break down nitrates and release nitrogen gas, is not in dispute here; it's part of the (complete) nitrogen cycle. It's basic chemistry.
It took about 4 months, for the anaerobic bacterial colonies to fully take hold in my tank's media, but once they did, it was remarkable to witness my nitrates plunging to almost zero and staying there, for months and months on end.
I also just set up a 4 gallon Walstad tank, this last month. (Plants haven't grown in yet.) I was regularly dosing 4 PPM of ammonia, which kept my nitrates at 20-40 PPM. When I finally added some established Biohome Ultimate media, from another of my tanks, the nitrates plunged to 0-5 PPM, in 4 days... 4 days. And it's stayed there, day after day after day, despite daily dosing of ammonia.
Of course, heavily-planted tanks, with faster-growing plants, can keep ammonia and nitrate levels low too (that's also basic chemistry), but not all people's tanks have such a high plant filtering capacity v.s. their bioload. So, for many of those folks, those elevated nitrate levels is a major reason for frequent water changes.
Anyway, keep on doing what works best for you.