Unpopular opinion on VCP an other "comp apps"

[campyfan39]

I would love to hear other opinions, and I am open to being wrong. That said, I think VCP and other comp sites and apps are worthless. I'm not sure how many times I have listed something for sale or tried to buy something on different platforms and have had people send me a screenshot of "comps." Whether higher or lower, I believe they are as obsolete as Beckett, who has 1952 Topps high numbers NM at $300! (Anyone who wants to sell for that, please contact me.)

Those apps track auction and eBay sales, not including the tax and shipping from eBay. What they do not do, and cannot do, is track the vast majority of sales. They don't have data on:

Collector-to-collector sales
Facebook sales
Instagram sales
TikTok sales
WhatNot sales
Card show sales
Net 54 and other forums' sales
Direct from the dealer's website sales

I buy and sell easily 90% of my cards on platforms that are not taken into account by those apps. So why are they like the gospel truth to so many?
Thanks for the discussion