Ah, i was hoping you had some specific research or papers that calls out the methodology being questionable, but another poster provided some links. Hopefully they are reliable.
Because phones have the most sensitive data out of all your devices for most people, and they are also the easiest to break, lose, get stolen, or have an unauthorized users access its contents.
Its just to protect the users from themselves and others.
Solar powered, wireless, remote, battery-powered, GPS tracked, overly-designed mobile CCTV/loudspeaker/strobe light trailer. This one in particular is manufactured by a company called LVT, who are one of the major manufacturers of these. They can go about 5 days with no sunshine before the batteries are depleted.
Have you tried Krita as a photoshop replacement?