Photoshop is practically the standard of editing today. Sure everyone will say “Open your editing software”, but what they mean is start Photoshop. There is a good reason for that too. Adobe (and Photoshop) have been in the market for a really long time, they have experience and PS integrate nicely with the Creative Cloud. There are some options out there, but none are considered as fully featured and rounded as Photoshop, which (like microsoft word in their days) make it the de-facto standard.
But all this is about to change if Affinity Photo will have their say.