Why do people feel the need to disclose they hold Mag 7 stocks?

I'm talking about posts where a person makes a bull case for a Mag 7 stock and then ends it with something like “Full disclosure: I own shares of META and NVDA”. Or “I knew was a screaming buy at $x and bought some there.”

Fact is, if you have a 401k that invests in an S&P index fund, or if you DCA into VOO or whatever other S&P fund you're into, then Mag 7 is already your primary holding. And I would guess one or both of those scenarios cover 95% of the people who post here.

Look at VOO. 28% is Mag 7 (or 6, since TSLA isn't in the top 10) : https://www.marketwatch.com/investing/fund/voo/holdings

“I own Mag 7” comments sound as bizarre as “I breathe air” or “I drink water”. We all do. Nothing special about it. The exception is if you own a ridiculous amount, like people who have $1M+ of NVDA now that they first started buying in 2011. Also, if anyone feels bad they didn't buy META at $100 or NVDA at the end of 2023, they shouldn't because they actually did buy there if they were actively contributing to their 401k or Roth.