Either there is a curious contrast between how much people are willing to spend on a headset and how much they are (presumably) spending on flying,
or a lot of people on these forums rarely if ever do any flying
There is another possibility, which is that a lot of people are not too bothered about whether they can hear ATC properly. Judging from what I hear on the radio fairly regularly
this is a plausible explanation too.
A really good headset is like a really good GPS. It will last you for many years, can be used in any plane that you will ever own or fly in, and will make a lot of difference.