Earlier quoted context omitted.
Below a certain threshold, "quick calls" are the best thing to do. Some of the most inspiring discussions come from someone bringing up an issue they have right there and then. Good discussions often start from something that doesn't seem so important, that doesn't have a clear outline from the start. If there isn't the possibility to start a discussion instantly once in a little while, there is a good chance it won'…
Pray tell, why can't you do this discussion async in writing?
On the other hand, in secret 1:1 calls with no trace, that only help one and only one person, you can appear busy and productive while also helping people in secret, and doing so multiple times for the same or similar problem. You reap the rewards multiple times.
And since people never put any initial effort at all (they just say "hi do you have a minute?" instead of describing their issue), if multiple people have the same problem right now, then you have plausible deniability for your multiple calls because you didn't know that they had the same issue, so that's why all calls were separate instead of solving them all at once.
Don't even mention the fact that others can explain their initial problem with screenshots, or with a Slack recording (literally 2 clicks, and then doing exactly the same as they would do during the first minute of the call anyway), to get quick context and then either solve the problem instantly or jump to a call. Nono, while those things get points for not being searchable, they still leave some useful information in the history (mainly some context and the moment in time when you had that conversation), and we can't risk having that.
Also, if they send the video, Slack might even include a searchable transcription (I don't know if that's a feature yet though), and if that wasn't bad enough, if you end up not knowing the answer, the video can even be shared with others on a shared channel to save time finding the person who knows how to fix the problem.
Hopefully you understand now the problems with async text communication.