I found this interesting:

“I can only speculate that after having experienced lockdowns thanks to the pandemic and with travel restrictions having recently been lifted worldwide, writers are eager to make up for lost time,”

A lot of the writers I know where I am (large Midwestern city) hated the pandemic because it created a ton of new writers who suddenly decided they wanted to do graffiti. One of the well known writers said it basically flooded their scene with a bunch "toys" (inexperienced poor artists) who were needlessly tagging anything and everything. They didn't know a lot of the unwritten rules and in many instances have pissed off a lot of the more experienced writers and their crews by going over older pieces, or putting up garbage over well respected writers. Its caused a lot of upheaval in the culture for several years. Things are starting to level out, but there's still a lot of younger writers still learning how this whole thing works.

It is true that even in our city I've seen a big influx of writers and crews coming from other cities. Unless you're a huge name in another country, its a good bet you're stuff will get covered up pretty quick as writers and crews are insanely protective of spots.

Graffiti has a lot of weird paradoxes like the fact there's "no rules" but there are a ton of unwritten rules writers and crews must follow.