You are, but it is a common misunderstanding.
The “one weekend a month, two weeks a year” thing is no longer true, if it ever was. That is the absolute minimum commitment for a Guardsman, be it in services, the band, armor, infantry, flight, whatever.
However, rated officers and enlisted people have a much more substantial commitment than that. Take me, for instance. I am a rated enlisted man, so in addition to my standard commitment I must fly for proficiency, typically a minimum of 4 hours per month. I have semi-annual flight training requirements that must be met. I must also be available for immediate deployments should the need occur.
The Guard is largely seen as a cost-effective way of running the military. We can be federalized at any time, yet we don’t draw a full-time salary and we don’t get full-time benefits. Yet we are largely looked down upon by the active duty military as so-called “Weekend Warriors” even though we carry much more of the burden than we should, being such a small component of the military.
The pilots flying the F-22 will be just as proficient as those on active duty. They get their initial training at the same places side by side and the instructor pilots in the Guard are typically very experienced (I have pilots with well over 30 years of flight time). I wouldn’t worry about it were I you.