It is absolutely not "very hard." It is challenging at first because like anything else, the startup costs of new habit formation can be high. But tofu, soy milk, seitan, tempeh, lentils, and many other plant protein sources are highly available and easy to cook with once you try. Been at it for a few years myself and at this point, it's extremely easy. I take protein shakes when working out, just like I did when I ate animal products.

Everyone is different, but if you weren't actually able to hit protein macros then I think that's a skill that isn't too hard to improve for most people (if they have a decent reason for wanting to go vegan in the first place).